Units 2-3 Test Review

A substance that is formed as the result of a chemical reaction is a __________________

• Product

• Reactant

• Starters

• Enders

A change in the shape of an object is an example of _________________.

• a chemical change

• energy

• an endothermic change

• a physical change

Which of the following is an example of a chemical change?

• rusting of a bicycle
• painting a house
• washing a dog
• tearing up a newspaper

Which one shows that a chemical reaction has occurred?

• dissolving

• melting

• formation of a gas

• bending

What is the BEST definition of a chemical reaction?

• A change in matter that produces one or more NEW substances

• When two things combine and EXPLODE.

What is the phase change of a solid to a liquid?

• freezing

• melting

• boiling

• condensation

5. What is it called when a solid turns directly into a gas?

• Sublimation
• Condensation
• Liquid

7. All phase changes (changing states) requires energy to be added or taken away.

• True
• False

Change from Gas to Solid is called........

• Sublimation
• Deposition
• Fusion
• condensation

Change from gas to liquid...

• condensation
• evaporation
• expansion
• movement