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What Is Chemistry?

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by

Katelynn Dorn

on 19 August 2016

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Transcript of What Is Chemistry?

What Is Chemistry?

Classifying Matter
Record observations about each object's characteristics in a table.
Divide the objects into three categories.
Describe the basis for each category you created.
Give an example of how using categories makes describing objects easier.
Describe a system of categories that could be used to classify matter and why.
Examples of Chemicals
What are the following activities examples of?
cooking food
striking a match
switching on a flashlight
starting a car
taking antibiotics for an infection
What would you say to a person who wanted to know about the different states of matter?
Describe those differences to your partner.
Changes of Matter
Physical change
- change in
appearance
of matter, such as tearing a piece of paper, mixing sugar into tea, crushing a Jolly Rancher
Chemical change
- change in
identity
of matter: evidence is: precipitate forming from two solutions, giving off of light energy, gas bubbles forming, color changing due to a chemical reaction
Make a list of chemicals.
How many can YOU think of???

Then, in your own words, write a definition for the word 'chemical.'
On Your Own
Do you think there are good chemicals and bad chemicals? If so, how do they differ?
What are some classifications of matter?
What is the difference between a chemical change and a physical change?
Physical States of Matter
Think Time!
Solid- fixed volume and fixed shape
Liquid- fixed volume but not a fixed shape
Gas- neither fixed volume nor fixed shape
water
salt
vinegar
wool
gasoline
shampoo

A
chemical
is any substance that always has the same composition throughout, no matter what.
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