**Layering & Positioning**

**Unit**

The International System

**Measurement**

**Meter**

**Gram**

A

measurement

is a value that tells the amount of something.

A measurement has a

quantity

and a

unit.

A

unit

is a fixed amount of something.

The cat is 15 inches long

The tiger is 8 feet long

Which one is longer?

The type of the unit makes a big difference here!

U.S.A

Liberia

Burma

Units allow people to communicate amounts.

To make sure their measurements are accurate, scientists use a set of standard units that have been agreed upon around the world.

The International System of Measurement is known as the S.I. (Systeme International), and the Metric measurement system.

System of 10's

The metric system is based on 10's

Every time you go up or down a level, you increase or decrease by a factor of 10.

Kilo (k)

1000 x base

Hecto (h) 100 x base

Deca (da) 10 x base

Base Unit (1x)

Meter

,

Gram

,

Liter

Deci (d)

1/10 base

Centi (c)

1/100 base

Milli (m)

1/1000 base

Divide Quantity by 10 or move the decimal left for each step up

Multiply Quantity by 10 or move the decimal right for each step down

In the metric system, you have base units (

Meter

,

Gram

,

Liter

), and prefixes (

Kilo, Hecto, Deca

,

Deci, Centi, Milli

)

Length

is a measurement of

distance

.

The

meter

is the metric unit for length.

What is a Measurement?

Questions

from me

to you

What is a Unit?

Metrics or SI is based on a system of ____?

What is length? And what is

the SI unit for length?

**Liter**

Volume

is a measurement of the amount of space something occupies.

The

liter

is the metric unit for volume liquids.

**Measuring Liquids**

The surface of a liquid forms a curve rather than a straight line.

That curve is called a meniscus.

If the meniscus curves downward, read the volume at the bottom of the curve.

Mass

is the measure of the amount of matter that makes up something.

The

gram

is the metric unit for mass.

**Goes on page 7 in your ISN**

AVID EQ: What is the benefit of using the Metric System?

**Metric System**

(SI)

of measurement.

(SI)

of measurement.

**Temperature**

Temperature

is a measure of how hot or cold something is.

As particles move faster on average, the temperature goes up.

As particles move slower on average, the temperature goes down.

Celsius (C)

and

Kelvin (K)

are metric units for temperature.

K

= 273 +

C

C

= 5/9(

F

- 32)

F

=

C

x 9/5 + 32

Converting

temperature

Every substance that we are aware of freezes at this point.

-273 Degrees Celsius

0 Degrees Kelvin

**Questions**

from me

to you

from me

to you

What is volume? And what is the SI unit for volume?

What is a meniscus?

What is mass? And what is the SI unit for mass?

What is temperature? And what are the SI units for temperature?

The prefix centi(c) is _____ times larger than milli (m).

The prefix deca (da) is _____ times smaller than kilo(k).

By: Mr. Begoyan

Homework

-On page 6, write a paragraph (5-6 sentences each).

-Research why the initial metrication of the US in the 1970s did not work.

-Use pictures as necessary.