Vocabulary
Is ice cream melting an example of a physical change? Why or why not?
Yes. Ice cream melting is a change in matter but there is no change to the chemical properties of the ice cream.
Is rust an example of a chemical change? Why or why not?
The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide.
These molecules in this state of matter can move freely and will take the shape of any container you put them in
Liquid
Physical Properties
True or False?: A physical change is a change that affects one or more physical properties
True
True or false? A chemical change is when one or more substances change into another substance entirely.
TRUE
The molecules in this state of matter move rapidly and freely whereever there is open space.
Gas
Type of change where a new substance is created
Is Alka-seltzer and water an example of a physical change?
NO, when you mix Alka-Seltzer and water, bubbles form, which indicates a chemical change as taken place.
Which of the following is NOT an example of a physical change? crumpled paper, pencil sharpening, shrunken clothing, or sour milk
Sour milk
The change from a liquid to a gas is called
Evaporation/boiling
Type of change where the substance stays the same, but size and shape might change
Physical Change
Explain how water can be an example of a physical change
Freezing and melting of water
Name two indicators of a chemical change.
a. odors
b. fizzing / foaming / gas formation
c. change in energy, temperature, and color
What state of matter has particles that are close together and in fixed position but vibrate?
Solid
This state of matter keeps a definite shape
Solid
Challenge! Explain how the water cycle is an example of a physical change.
It is a physical change, because water changes from a liquid/solid when it precipitates, to a gas when it evaporates, then forms back into a liquid when it condensates. Then the process repeats again with the same substance, WATER!
Is cooking an egg an example of a chemical change? Why?
Yes, a chemical change means that something is permanently changed and there's no way to get it back. The proteins in the egg white/yolk are subjected to high heat, they change into varying proteins.
What is an example of a physical change that happens inside your body?
1. Food being broken down by enzymes in your stomach,
2. Food being broken into small pieces by your teeth
3. Food being moved from your esophagus into your stomach
4. Water being absorbed inside your large intestine
2. Food being broken into small pieces by your teeth