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Vocabulary
Physical Change
Chemical Change
Matter
Chemical Reactions
100

A property that does not depend on how much you have and helps identify a substance.

What is intensive.

100
Is a melted popsicle an example of a physical change?
What is YES? You can melt and refreeze a popsicle and it will still be a popsicle.
100
Is rust an example of a chemical change?
What is YES? You cannot change rust back into the metal is was before; therefore, it is a chemical change.
100

Definition of matter.

What anything that takes up space and contains mass?

100

Copper is an element that is used in electrical wires. What is the smallest unit of copper that still maintains the characteristics of copper?

atom

200
These are the characterstics of an object and you use your senses to identify them.
What are PHYSICAL PROPERTIES?
200
Is Alka-Seltzer and water an example of a physical change?
What is NO? When you mix Alka-Seltzer and water, bubbles form, which indicates a chemical change as taken place.
200

Hydrogen gas explodes because of this chemical property.

What is flammability?

200

Name the 3 types of matter.

What are SOLID, LIQUID, GAS?

200

In a chemical reaction, no new atoms are created, and no atoms are

Destroyed

300
Type of change where a new substance is created.
What is a CHEMICAL CHANGE?
300
Name a food that is an example of a physical change.
What is a salad or trail mix?
300

Explain why a cake is an example of a chemical change.

Ex. because you cannot turn a cake back into the eggs, flour, sugar, etc. that you mixed together?

300
These molecules can move freely and will take the shape of any container you put them in.
What is a LIQUID?
300

Increasing the amount of reactants may increase the amount of

products

400

A mixture where all the substances are in the same phase. It also can go by this other name.

What is a homogeneous mixture and solution?

400
Explain how water could be an example of a physical change.
What is freezing and melting water to and from ice is an example of a physical change?
400

True or False. Turning peanuts to peanut butter is an chemical change. Explain.

What is FALSE? To make peanut butter, you grind up roasted peanuts, so nothing new is being created.

400
These molecules move rapidly and freely whereever there is open space.
What is a GAS?
400

The driving forces for a chemical reaction.

What are gas formation, solid formation, water formation, and electron transfer?

500

Explain the difference between an atom and a molecule.

Atoms are the smallest unit of an element that still has the properties of that element. Molecules are two or more atoms bonded together.

500

When a precipitate is created during a chemical reaction, it creates a heterogeneous mixture composed of a solid and a liquid. Explain how the mixture can be separated.

What is by using filtration.

500

Explain why producing gas from crude oil is a physical change, but driving with gas is a chemical change.

What is the crude oil is broken down into smaller pieces using a separation technique called distillation by driving with gas leads to the combustion of the gas in the engine.

500

Explain the Law of Conservation of Mass (Matter).

Matter can not be created or destroyed, it can only change forms.

500

What are 4 signs of a chemical reaction?

what is color change, formation of gas, formation of solid, temperature change, emission of light, or combustion.