Show:
Vocabulary
Physical Change
Chemical Change
Matter
Chemical Reactions
100
Anything that has mass (weight) and takes up space.
What is MATTER?
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

True or False. If a person weighs 90 kg on Earth, they will weigh 90 kg on Mars as well.

What is FALSE?

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
Name the two indicators of a chemical change.
What are color change, bubbles, temperature change?
200

Name the 4 types of matter.

What are SOLID, LIQUID, GAS, PLASMA?

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 type of change where the substance stays the same, but size and shape may change.
What is a PHYSICAL CHANGE?
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.
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

In this type of reaction, it takes more energy to break the bonds of the reactants than is released when the bonds in the products are formed

endothermic

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
CHALLENGE (not a quiz question): Explain how the water cycle an example of a physical change.
What is YES, 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!
500
CHALLENGE (not a quiz question) Explain how a rocket launch is an example of a chemical change.
What is the fuel combines with another chemcial to produce large volumes of a hot gas that propel the rocket into space?
500

Explain the Law of Conservation of Mass (Matter).

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

500

CHALLENGE (not on test). One clue of a chemical change is the formation of a...

precipitate.