Show:
Vocabulary
Physical Change
Chemical Change
Matter
Evidence of Chemical Changes
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 you know the weight of a portion of an object than you CANNOT determine the weight of the whole object?
What is FALSE?
100

Mixing baking soda and vinegar creates this type of gas production visible as fizzing or bubbling.

What is the formation of gas (or bubbles)?

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 3 types of matter.
What are SOLID, LIQUID, GAS?
200

An iron nail left outside turns from a silvery-gray to a reddish-brown color because of this process.

What is a color change (or rusting)?

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
Name a food that is an example of a chemical change and explain why.
What is a cake, 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

The solid particle that forms and settles out of a liquid solution during a chemical reaction is called this.

What is precipitate?

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

A reaction that absorbs heat and feels cold to the touch is known by this scientific term.

What is an endothermic reaction?

500
This type of matter keeps a definite shape.
What is a SOLID?
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
Identify 1 example of a solid, liquid, and gas.
What is Solid- desk, book; Liquid- water, lemonade; Gas- helium, air?
500

To confirm that a chemical change occurred instead of just a physical change, a student must look for evidence that a completely this was created.

What is a new substance?