**The Scientific Method**

"Classifying Matter"

Measurement

Essential Questions:

Size and Scale

**The Nature of Science,**

Matter, and

Measurement

Matter, and

Measurement

Thank you!

**Chemistry**

Unit 1

Unit 1

**an organized approach to solving problems and learning about how the natural world works**

**You use it on a daily basis:**

**Where are my keys?**

**Where is my bag?**

**Can you think of any others?**

Monty Python and the Boy in the Water

Watch these video clips from Monty Python and answer the questions on the associated worksheet.

Inference vs Observation:

Observation:

using one or more senses

to obtain information

This is not an opinion

Ex: sight, smell, taste, touch, hearing

Inference:

using what you know to make an educated guess

Based on reasoning from what you already know.

This can be a scientific opinion.

**Experimental Design**

**Now that you've refreshed your knowledge of the scientific method, we're going to look at how it is used to design and carry out experiments. This is a skill that will be drawn upon throughout our study of Chemistry.**

**Please turn to "Fundamentals of Experimental Design"**

**You may work with your partner to complete this packet.**

**Once you are finished, you may start on designing your own experiment on "An apple a day..."**

Essential Questions:

1. What is matter?

2. What are the 4 phases matter can be found in?

3. Create a diamond foldable to describe classifications of matter.

Please take out a piece of folder paper and write the proper heading on it.

Title: Unit 1 Warm-ups

You do not need a new piece of paper for each warm-up, you may leave a line or two of space in between each warm-up question.

Each warm-up will have its own title and date.

Title: Millions to Measure Sort

5 minutes.

Please be prepared to share your answer with the class.

Unit 1

title:

1. What are the units to measure length, volume, and mass?

2. For the following prefixes, write the number to express them.

kilo-, deci-, centi-, milli-, micro-

1 min. discuss with partner. Be prepared to share with class.

2 min. Write the question. Think about the answer.

Write your answer.

In 1999, NASA lost a $125 million mars orbiter because the Lockheed Martin group of Engineers used the English system (pounds, inches, feet) while the NASA scientists used the SI units (centimeters, meters) for a key.

After 286 days of traveling to Mars, the orbiter, fired its engine to push itself into Mars orbit. Because of the discrepancies in calculations based on the two teams using different measurement systems, the orbiter entered Mars atmosphere instead of going in to orbit around the planet. It was burned up on entry into the atmosphere because it wasn't meant to withstand the heat.

http://www.cnn.com/TECH/space/9909/30/mars.metric.02/

Systems of measurement:

Measurement is a type of data that is often collected in science experiments.

Types of

data:

qualitative

quantitative

What's the difference?

numbers

descriptions

Examples:

The desk is

1 meter tall.

The desk is

heavy

U.S. Customary Units

Metric

Based on:

How many countries use it?

3

All others

http://education-portal.com/academy/lesson/english-system-of-measurement-definition-history-advantages-disadvantages.html#lesson

some from Romans,

lengths on body

meter and gram

multiples of 10

base units:

One of the most important things in science is that findings are communicated to the scientific community. It's all about collaboration!

Why might sharing scientific findings be important?

2 min discuss with partner.

Why is it called America and not Columbosa?

America is named after a lesser known explorer, Amerigo Vespuchi. He traveled

to

the "New World" after Columbus but he did one thing Columbus didn't...

He wrote about it!

A cartographer was making a map of the new world and read about Vespuchi's travels and named the new continents after him.

SI Units:

SI stands for systeme international d'unites

The system is built on seven base units.

Please copy this table into your notes.

Base units can be too large or small for some measurements so the base units are modified using prefixes.

SI prefixes:

1,000

100

10

.1

.01

.001

With your partner, write the factor as a number (or decimal).

With your partner, determine what is the pattern you see here as you look at each prefix.

going down the column?

going up the column?

decrease by a factor of 10

increase by a factor of 10

On your metric system notes,

Please complete the metric ladder.

Title: Experimental Design Date:1-14

What do you think important steps are to take when designing an experiment? Why are they important?

Now that you've answered on your own, discuss with your partner and be prepared to share your answer(s).

Write down any vocabulary associated with experiments.

Experimental Design

We've discussed the importance of asking questions and testing hypotheses in science. Now, we're going to review the process by which this is accomplished.

Intro to POGIL.

Process

Oriented

Guided

Inquiry

Learning

What is POGIL?

It is based on a group-learning research-based strategy

The goal of POGIL is to foster critical thinking, problem-solving and collaboration in a classroom.

It asks you to interpret models.

All of the information you need to solve the problems/answer the questions is in the POGIL

Please turn to your POGIL: "Fundamentals of Experimental Design"

Please read to yourself the paragraph at the top under the word, "Why."

When you're done reading, look up so I know you're finished.

In a POGIL, you will be given models to look at. Read all of the info carefully. It is important for understanding the concept being taught.

with your partner, please read and answer the following 4 questions.

When you finish, move on to the next page and work until the stop sign.

trial 1

number of tablets

final temperature

volume of vinegar

room pressure

initial temperature

similarities:

volume of alcohol

room pressure

all contain C,H,O

differences:

number of carbons

boiling point (b.p.)

type of alcohol

boiling point

volume of alochol

room pressure

On the first page, you have some space at the bottom...

Concept Check:

Please write this question in that space and take 2 minutes to think about your answer to it.

Is there a pattern in how many variables (things) are changed in models 2 and 3? Are all the things changed in each of the trials in models 2 and 3?

Now that you've had time to think about your answer, please discuss it with your partner. Be prepared to share.

In each of the trials, only 1 variable (thing) is changed.

In experiments, it is important that in order to test hypotheses, only one thing (variable) can be changed. All other variables must remain the same.

That means it's an important point!

it's important to always read the read this section! It contains very important information.

number of

tablets

final

temperature

initial temperature

volume of vinegar

room pressure

type of

alcohol

boiling point

volume of alochol

room pressure

Please work on these questions and the questions on page 4 with your partner.

An Apple a Day...

With your partner, choose a statement

from those listed on your worksheet.

Your job is to design an experiment to test the validity (if it is true or not) of the claim.

Once you have finished your write-up (be sure to use the rubric on the back), find another group who is also finished and trade. You grade them, they grade you. (T&G = trade and grade)

With your partner, work together to sort the pictures by what unit you would use to accurately measure the items in the pictures.

Sort

You will be given pieces of paper that have pictures, words or titles on them. Your job is to sort them into categories. Sometimes the categories will be given to you and sometimes you will based on the items given, you will have to sort them into categories that you decide.

Title:

Measurement in Science

In chemistry, you will spend time gathering quantitative data, generally in the form of measurements.

List as many measurements using the metric system as you can.

centimeter

Date:

Why do you think science uses a set of units that have been agreed upon to be the same internationally?

Please also enter this in your T.O.C.

Title: Analyzing and Interpreting Scientific Data

Please use the class copies to answer questions 1-10 on the paper you picked up yesterday.

Don't forget to put this in your T.O.C.

Don't forget to put this in your T.O.C.

(this goes in notes section)

Don't forget to put this in your T.O.C.

notes section

10 minutes

Here's one to get you started...

Note-taking

When taking notes in this class, we will use a modified version of Cornell Notes.

title

date

unit:

Essential Questions:

Objective:

Thinking Side:

Main Notes:

Summary:

For your notes summary, you will answer the essential questions (in complete sentences).

pictures,

questions,

headings/

sub-headings

Objective: To understand the metric system (specifically S.I. units) and collect data using it as well as convert between units.

On the inside of your metrics foldable...

length/distance

mass

volume

basic unit:

meter

abbreviation:

To measure length:

mass is:

m

ruler

meterstick

tape measure

a measure of the number of atoms in an object combined with the density of those atoms

basic unit:

gram

To measure mass:

use a balance (triple beam or analytical)

volume is:

the amount of space a substance or object occupies

basic unit:

Liter

Abbreviation:

L

To measure volume:

Abbreviation:

g

graduated cylinder

volumetric flask

Using a Ruler:

This ruler measures in millimeters

Most rulers measure in centimeters.

With your partner, look at the ruler you have (be sure you're looking at the metric side!) and decide what unit the smaller tick marks measure.

millimeters

Using a triple beam balance:

1. Read the number on the hundreds line.

2. Read the number on the 10s line.

3. Read the number on the ones line.

Add up all the numbers.

That is the total mass of your object.

With your partner, what is the unit that the mass you calculate will be in?

grams

Measuring volume: using a graduated cylinder

What's a sort?

http://learn.genetics.utah.edu/content/cells/scale/

micrometers

femtometer

meter

nanometer

kilometer

micrometer

terameter

meter

meter

meter

meter (kilometer?)

meter

(centimeter?)

centimeter

kilometer

millimeter

kilometer

millimeter

meter

kilometer

kilometer

(gigameter?)

centimeter

(millimeter?)

nanometer

nanometer

micrometer

On your metric system notes foldable, please turn to this section:

kilo

deca

hecta

centi

deci

milli

1,000

100

10

1

.1

.01

.001

meter

liter

gram

How much larger is deca compared to the base unit?

10

How many times larger is hecta than deca?

10x

How many times larger is kilo than hecta?

10x

How many times larger is deci than centi?

10x

How many times larger is centi than milli?

10x

What is the pattern you see in size difference between each unit and the unit "below" it on the "ladder"?

The metric Ladder

Units next to each other are 10x larger or smaller.

x 10

x 10

x 10

x 10

x 10

x 10

Converting between units in the metric system:

Because each unit is 10x smaller or 10x larger than the unit next to it, is why you can "move" the decimal one place.

What does it mean to move the decimal one place?

it's all about place value!

In the number: 327

What are the places of each digit?

hundreds

tens

ones

1s

10s

100s

As we move left, how many times larger is each position?

10x

As we move right, how many times smaller is each position?

10x

1

10

or

Now, with a decimal...

327.4

tenths

17.591

What place is the 4 in?

tenths

hundredths

thousandths

.

.

As we move further left, each place is 10x larger

As we move further right, each place is 10x smaller

decimal really means:

based on 10

from latin: decima

a tenth part

Now it's your turn!

Try to complete all the conversions on this page!

let's see how you did!

1

milli- is how many times smaller than the base unit?

1,000 times smaller

So for every 1 gram, there would be how many milligrams?

1,000 mg

Remember that Liter is a base unit.

What is the value of base units?

1

milli- means?

one thousandth

What is one thousandth as a fraction?

1

1,000

So how many milliliters in 1 L?

1,000

What does centi- mean?

one hundredth

Written as a fraction?

1

100

Milli- means?

one thousanth

Written as a fraction?

1

1,000

How many times bigger is centi- compared to milli?

10x

So, because 1 cm is 10x bigger than 1 mm, you need to increase the number in centimeters by 10x (multiply by 10) to convert it to mm.

1600

double check. Does this number make sense?

Which is the smaller unit?

mm

When you're going from cm mm, do you expect your mm value to be smaller or bigger than the equivalent amount in cm?

Bigger because mm is the smaller unit so it takes more mm to be the same amount of cm.

Warm- up:

"Thinking metrically"

1. What unit would you measure the depth of the deepest point of Hanauma Bay in?__________

2. What unit would you measure the mass of one spam musubi in? _________

3. What unit would you measure the volume of a glass of water in? _________

meters

grams

milliliters

Which is the bigger unit? kilometers or meters?

14,000

Which is the bigger unit?

kilograms

How many grams in 1 kilogram?

1,000

more or less kg?

less

dividing or multiplying?

divide

by 1,000

0.109

0.250

How many milligrams in 1 gram?

1,000

Is 698 milligrams more than or less than 1 gram?

less than 1 gram

kg

m

g

mL

mm

L

km

cm

mg

2

5,000

104,000

4.8

5600

560

.8

.198

160

2.5

.075

65,000

0.5

0.12

63

1

2

3

4

5

Aww or Ouch?

kilo puppies

centi iphone

kilo-papercuts

deca babies

kilo-dollars

milli-puppy

hecto-iphone

centi-papercut

deci-baby

milli-dollar

Warm-up 4:

"Measurement Tools Used in Lab"

What do we use to measure_________

mass

volume

length/distance

balance (triple beam or analytical)

graduated cylinder

ruler or meter stick

**Our First Lab**

Pre-lab:

Before each lab, we will complete pre-lab work. The purpose of this work is to know what you are going to do in the lab and why.

Lab Rules:

Are we using heat, chemicals or glassware?

Yes (glassware)

Safety goggles and closed-toed shoes required.

Absolutely NO MESSING AROUND.

All of the instruments you will be using are tools to help you complete this lab. They are never to be used as toys in any way.

Did you turn in your safety contract? Pass the safety quiz with 100%?

If not, then no lab participation.

Pre-Lab Continued

Lab Group Member Roles:

1. Scribe

Writes down data so that other group members can complete the work

example: If lab work requires hands or gloves getting messy.

2. Task Manager

This person ensures all group members are working and contributing

example: One person isn't doing all of the work.

This person also is responsible for making sure the lab group is completing the lab by following the directions.

3. Foreman:

This person communicates with the teacher. They represent the group. They ask questions to the teacher if the group is confused.

If we need to collect data from each group, this person will share with other group's foreman or write on the board (depending on teacher's directions).

Lab Group Roles...continued

"Balances, Rulers and Cylinders...oh my!"

At each lab station, you will find the materials you need to complete the lab as well as the lab directions (they are class copies in page protectors)

You will be writing a lab report for this lab.

Please turn to the lab report write-up how to sheet

(it says TITLE: Use the title on the lab worksheets) at the top

Please get out a piece of folder paper and title it using the lab title at the top of this slide.

Purpose:

To use lab tools for measurement to make simple measurements so that students know how to use these tools in future Chemistry labs.

At the top of your paper, please put your proper paper heading. In addition to what we usually include on our proper paper heading, please also write your group role.

Proper paper heading (for labs):

Last name, first name

Date(s):

Period:

Unit:

Group Members:

My Group Role:

Hypothesis:

For this lab, you will be completing mutliple different tests to practice measuring volume and mass.

Please make hypotheses that answer the following questions:

How many drops of water will it take to equal a milliliter of water?

Will the water level in graduated cylinder rise if you place 3 marbles in it?

Is the volume of a drop of water different if the water is colored using food coloring?

Materials:

Write a list using bullets

Procedures:

In this case, you will have multiple procedures. You are going to write a procedure for each part. Write all the procedures in this section, please.

write in step-wise format (number format)

Data:

Lab data is always written in an organized manner.

The purpose of writing down data is so that you can analyze it and decide if it supports or rejects your hypothesis.

If you can't read and/or follow your data, you can't support or reject your hypothesis and the experiment is pointless.

If your data is not in a readable and organized (well labeled!) format, I will not grade your lab report.

Quantitative Data:

numbers or descriptions?

Data Table:

Data part A:

drops to 11mL

drops to 12mL

drops to 13mL

drop number

Average:

drops

Discussion:

This is written in paragraph form.

Be sure to see the directions and include all the required elements:

Explain what you did to conduct the experiment.

Explain your observations/results/data.

Explain anything that went wrong and how you could improve your experiment or lab techniques.

Conclusion:

This is a summary of the lab.

This is where you accept or reject your hypothesis based on your data and discussion.

You must say why you accept or why you reject your hypothesis based on your data results.

Please read the next page which describes proper and improper grammar and other terms.

Please read the rubric on the next page so you know how each lab report will be graded.

Lab Processing:

Please write up your conclusion and discussion using the rubric given.

In your discussion, please be sure to write about your procedures and data collection.

In your conclusion, please be sure to support your answer as to whether or not you accepted your hypothesis with evidence.

What is evidence?

your data

1,000 puppies

a puppy cut into 1,000 pieces

No warm-up today!

Quiz 1.2

Please work individually to complete your quiz. You may use a calculator, you may not use your phone as a calculator.

There are 6 questions.

They include:

selection

conversions

short answer

"Writing Big Numbers"

(Please)

write the number:

300 million

300,000,000

That's a lot of numbers to write!

Can we write this any other way? (

hint: a shorter version that requires less numbers

)

How about scientific notation?

3 x 10

8

How did we do that?

You just completed a lab using various measurement devices you will use often in Chemistry labs...

Please read the "why" section with your partner. Please be prepared to answer this question:

Why is it important to have a standard method for recording measurements?

between 0 and 10 cm

No, some have different numbers for ones place, tenths and hundreds place.

They could divide it in 4 pieces. The metal strip is more than one quarter of the ruler but less than one half.

They could divide it in thirds and see that the metal strip is about one third of the ruler length long.

Each centimeter

ones place (3)

The tick marks on the ruler and in 1cm increments.

Model 1, Ruler A

It did not have smaller increments to show individual centimeters.

The ones and the tenths (3.2)

Each centimeter was broken up into millimeters.

He has one more digit he can estimate based on the smallest marks.

Ruler C has smaller increments than ruler B, allowing Maya to measure 3.2 and estimate the digit in the hundredths place.

Ruler B because she was able to measure to the ones place and estimate the tenths.

He could accurately measure to the tenths place and estimate for the hundredths.

7

7.0

7

7.00

A valid measurement for this ruler would have how many digits?

3 - the ones, tenths, and hundredths

Please get out folder paper and write down the following

Title:

"Significant Digits and Measurement POGIL Extension Questions"

To take full advantage of the instrument's measurement capabilities. There should always be certain digits (that are read directly) and one estimated (uncertain) digit.

Only the first two (the 7 and 5) are.

hint: look on the class copies (pg. 3)

Yes, it is valid because the marks every 100 allow you to say with certainty the 7 and estimate the 5.

Please title this paper:

"Significant Digits and Measurement"

Don't forget to put this in your T.O.C.!

Unit: 1

Warm up 5:

"Chemquest 1: Numbers in Chemistry"

Don't forget to put this in your T.O.C.!

QFT - Question Formulation Techniques

Ground Rules:

1. Ask as many questions as you can.

2. Do not stop to discuss, judge, or answer the questions.

3. Write down every question exactly as stated.

4. Change any statement into a question.

1. Select a scribe

2. Follow the ground rules of QFT

3. Share questions slowly to allow the scribe to capture questions accurately.

4. Number your questions: 1, 2, 3, etc.

STEP 1:

Step 2: Categorizing Questions

Identify the level of your questions.

Level 1:

Specific information that can be found directly in the text.

One word, yes/no, copy/paste answers.

Level 2:

Answer implied in the text by finding information for the answer in several places.

Level 3:

Answers based on experiences and opinions that are supported by textual facts.

Step 3: Improving Questions

Look over your list of questions and select three (3) questions to "bump up"

Change a level 1 to a 2 or 3

Continue your numbering with these questions

Step 4: Prioritizing Questions

Choose the two (2) most important questions from your list.

Keep this in mind when selecting questions:

What questions would you need answered to learn about matter in the context of Chemistry?

Share your Questions

Please share:

Two (2) priority questions

Rationale for selecting those questions.

The numbers of your priority questions.

Question Level

Step 6: QFT Written Participant Reflection

Why is learning to ask your own questions important for learning?

What have you learned, how you learned it, and how you will use what you learned.

Please write the answers to these questions on a piece of folder paper and when you're done, wait until the end of the time (7 minutes).

Objective:

Students will be able to describe what matter is, the states it is found in and how it changes from one state to another and what those changes are called.

Thinking Side

Main Notes

What is matter?

Please write the question and a take a minute to write down your thoughts.

Objects that take up space and have mass have matter.

Everything around you has matter.

Examples:

Come up with 3 examples of things that are composed of matter.

Non-examples:

desk

person

whiteboard

wind

You can feel it on your skin but it's the movement of air (air has matter)

electricity

movement of electrons (the electrons are ,made of matter)

sound

Result of air movement on your ear drum. Not matter.

fire

The smoke that rises up from the fire or flame contains vaporized gases and small particles and therefore contains matter.

But the fire and flame themselves, the light and heat emitted, are energy, not matter.

Sort!

Matter or Not?

Remember, to complete a sort, you work with your group (or partner) to sort the items given to you into categories. Today, the categories are given to you.

Matter

Not Matter

Classification of Matter

All matter is composed of 110 different kinds of _______.

atoms

Mixtures

Compounds

Element

Classification of Matter

Atoms:

All matter is composed of about 110 different kinds of atoms.

How small is an atom?

draw!

http://learn.genetics.utah.edu/content/cells/scale/

Think-Write-Pair-Share_Write

It would take more than 3 million atoms side by side to span a millimeter.

Pure substances that contain only one kind of atom.

pure substance:

Sample of matter, either a single element or a single compound that has definite chemical and physical properties.

Smallest amount of an element.

Allotrope

different molecular forms of an element

O

O

2

3

Ex:

Pure substances that are not elements.

more than one kind of atom

2 atoms of oxygen and 1 atom of Carbon.

carbon dioxide

contain 2 or more pure substances

alloy

mixture of metals

ex: alloy wheels

= steel mixture

doesn't always have the same balance of ingredients

poke is a mixture of what?

depends on the poke...

shoyu, spicy ahi, etc.

Types of Matter

Foldable

Picture on front flap.

Example on back of flap.

Definition(s) on paper inside.

"Changes in Matter"

Is the making of elephant toothpaste a chemical change or a physical change?

Watch the demonstration of making elephant toothpaste.

Warm-up 7

Please state why (How do you know?)

When Matter Changes:

An example using the water cycle.

As you watch the water cycle demonstration, list all the changes of state that you see.

What are some changes of state?

evaporation

boiling

condensation

Now that you've listed changes of state...

Work with your partner to determine which changes are caused by gaining energy

losing energy?

Warm Up 8

Physical and Chemical Changes

List 3 qualities that indicate a physical change has occurred. List 3 for a chemical change.

physical changes:

chemical changes:

bubbles

changes of state

heating

dissolving

formation of a solid (precipitate)

change in color

**Old Stuff**

(Not for fall 2015)

(Not for fall 2015)

DA: Dimensional Analysis

With your group, please

make 1 dollar

out of each set of coins.

Discuss

with your group if the dimes and the the nickels measure the same thing? (are they the same amount of money?)

Now, please write a mathematical relationship to show this.

1.

10 dimes

20 nickels

20 nickels

10 dimes

Do these 2 fractions equal the same thing?

Did you write?

10 dimes = 20 nickels

Conversion factors change something to different version of form.

What is a factor?

Something that brings results or a cause.

What's a conversion?

The action of changing the "version" of a thing.

Let's think about this in math...(think: algebra)

A conversion factor is used to convert a measured quantity.

10 dimes

to a different unit of measure

100 pennies

without changing the relative amount.

What's the amount?

100 cents

How do we do this?

ratio

ways to write ratios?

part: part

A fraction!

(that equals 1)

What's a ratio?

part

whole

part

part

Two types of ratios are:

part: part

or

a ratio is just...

From above...our conversion factors for dimes to nickels in 1 dollar is really just a set of proportions...

check it out...

They equal the same thing because each fraction equals the amount of 1 (dollar).

How many seconds are there in 3 days?

days

seconds

How do we get from days to seconds?

3 days

minutes

hours

x

24 hours

1 day

How many hours in 1 day?

24 hours = 1 day

What are the two conversion factors for this conversion?

24 hours

1 day

1 day

24 hours

Which one do I use?

x

60 minutes

1 hour

1 minute

60 seconds

x

=

259, 200 seconds

DA: Dimensional Analysis

5. How many seconds are there in 2.5 hours?

(see whiteboard )

Do numbers 6 and 7 on your own.

Important dimensional analysis note:

on top = multiply

bottom = divide

Just like fractions

What is this?

Can't you just cancel out the 3s?

3

3 x 5

They're just division...remember fractions by pizza?

1

5

Important dimensional analysis note:

on top = multiply

bottom = divide

Just like fractions

What is this?

Can't you just cancel out the 3s?

3

3 x 5

They're just division...remember fractions by pizza?

1

5

Rules of Figs...Sig Figs, That is!

1. any # not zero = a significant figure

2. zeros between any non-zero #

3. zeros at the end of a number and to the right of a decimal point are always significant

Who's significant?

43.00 1.010 9.000

4 sig figs

Struggling? change the # to scientific notation

Significant Figures

62/41 = 1.512195122

ugly!

How many #s do I round to?

answer already answered by #s you divided in the first place.

62 = 2 sig figs

41 = 2 sig figs

round answer to 2 figures

1.5

How did I know 62 and 41 had 2 significant figures?

Sig Figs - dem zeros

decimal, to right and at the end = significant,

to the left of the decimal = not

extraneous zeros are eliminated with scientific notation

make me a sandwich (of zeros) = zeros between other numbers = significant

How to remember if they're significant or not...

d =

e =

m=

pennies

10 dimes =

100 pennies

part:whole

What is the ratio of girls to boys in the class?

date:

3. Write a conversion factor for...

Dimes and quarters in 1 dollar

Seconds in 1 minute

days in 1 year

Please write two conversion factors for each

years in 1 decade

decades in 1 century

10 dimes

4 quarters

4 quarters

10 dimes

60 seconds

1 minute

1 minute

60 seconds

365 days

1 year

1 year

365 days

1 decade

10 years

10 years

1 decade

10 decades

1 century

1 century

10 decades

4. Criss Cross Applesauce! (need your colored pencils)

How many seconds are there in 1 hour?

Step 1: Write the value you're starting with

Step 2: Write all the conversion steps you need.

Step 3: Write the conversions you will need

Step 4: For each conversion, write the two possible conversion factors possible.

Step 5: Choose the correct conversion factor for each step and write it. Remember you're trying to cancel out units so you want the bottom one to be the same unit as the unit on top to its left.

Step 6: Use criss cross appleauce to solve. Multiply the top first, then the bottom. Remember not to multiply all the way across and then try to do all the division at the end.

Step 7: Write your answer with the correct number of significant figures. Scientific notation eliminates extraneous zeros.

1 hour

hours

minutes

seconds

Steps 3-4:

hours

minutes

1 hour

60 minutes

60 minutes

1 hour

minutes

seconds

1 minute

60 seconds

60 seconds

1 minute

x

1 hour

60 minutes

x

1 minute

60 seconds

=

3,600 seconds

1 x 60 / 1 x 60 / 1

1 hour = 60 minutes

1 minute = 60 seconds

We will go over sig figs later.

5. How many seconds are there in 2.5 hours?

2.5 hours

hours

minutes

seconds

x

60 minutes

1 hour

x

60 seconds

1 minute

=

2.5 times 60 divided by 1 x 60 divided by 1

hours

minutes

minutes

seconds

1 hour = 60 minutes

1 minute = 60 seconds

1 hour

60 minutes

60 minutes

1 hour

1 minute

60 seconds

60 seconds

1 minute

9,000 seconds

1,000,000

.00001

.00000001

kilo

1,000

hecta

100

deca

10

10

10

0

1

meter (m)

liter (L)

deci

gram (g)

Base Units and SI Units are the same thing.

Don't be confused...

.1

.01

.001

centi

10

3

10

2

1

10

-1

10

-2

10

-3

10

10

10

10

10

Each unit is 10x larger than the unit below it.

Quick check: Do you know what the metric prefixes mean?

milli

the measured distance

from one side to another

meter

m

ruler, meterstick

10

tenths

ones

tenths

hundreths

6.53 cm

Does your number in the hundredths place have to be the same as mine?

No, because it's the estimated digit.

the amount of space a substance or

an object occupies

liter

L

graduated cylinder

But, remember not to pick up the graduated cylinder, lower yourself to the meniscus, not bring the meniscus to you!

Because of the parallax effect, you should always read volume measurements from eye level and take the measurement at the bottom of the meniscus.

ones

tenths

36.5

meniscus

Remember, the values are getting bigger going up a graduated cylinder because you fill it from the bottom.

a measure of the number of atoms

in an object combined with the density of those atoms

gram

g

balance (triple beam or analytical)

tens

ones

tenths

hundredths

Notes:

if something is in italics, you don't have to write it.

Students will demonstrate a thorough understanding of laboratory safety by completing the lab safety contract and scoring 100% on the lab safety quiz (online).

Students will become familiar with the 3 basic types of measuring instruments (ruler, graduated cylinder, and analytical balance) by completing the guided inquiry to measurement including significant digits on the back side of their metrics system foldable.

Students will become familiar with the metric system by taking notes about the prefixes and their meanings on their Metrics System Foldable. Understanding of the meaning of the metric system prefixes will be demonstrated by the correct completion of Aww vs Ouch on the foldable.

Learning Targets:

**How to Science!**

**Density Day!**

My Packing Dilemma

When my souvenirs are packed into my suitcase, did they increase the mass of the suitcase?

Yes

Did the volume of the suitcase increase?

No, the suitcase didn't get any bigger magically.

Is the suitcase more or less dense?

More dense

If we add more mass to the same volume, what happens to the density of the object?

Adding more mass to the same volume increases the density.

Destructive Habits

On your paper, cross out styrofoam and replace it with birdseed.