Physical Changes
Chemical Changes
Endothermic Changes
Exothermic Changes
Misc. Vocab.
100
TRUE OR FALSE - Ice, water, and steam are different substances.
FALSE - They are all states of matter for H20.
100
TRUE OR FALSE - Burning wood is a chemical change.
TRUE - It is no longer wood after it burns.
100
Endothermic reactions feel (hot/cold).
Cold
100
Exothermic reactions feel (warm/cool).
Warm
100
Energy is the ability to do _______________________.
Work
200
TRUE OR FALSE - Splitting water into hydrogen and oxygen by running electricity through it is a physical change.
FALSE - It is a chemical change. It's no longer water.
200
Chemical changes form new ______________________.
substances
200
TRUE OR FALSE - A fire burning is an example of an endothermic reaction.
FALSE - Fire is an exothermic reaction.
200
Fire burning is an example of an exothermic reaction.
TRUE - It feels warm. It's letting heat OUT.
200
Mass cannot be destroyed in a chemical reaction is an example of what law.
Law of Conservation of Mass
300
TRUE OR FALSE - Smashing an ice cube with a hammer is an example of a physical change.
TRUE - It is still ice.
300
TRUE OR FALSE - Boiling water is a chemical change.
FALSE - It is a physical change. It's still water, just in a different phase.
300
What does Endo mean? What does Thermic mean?
Inside, Heat
300
What does Exo mean? What does Thermic mean?
Outside, Heat
300
Temperature measures how much ______________________ is in matter.
thermal energy, heat, energy
400
TRUE OR FALSE - Mixing salt and water together is a physical change.
TRUE- You can recover the salt by boiling the water. This is a mixture, not a chemical change.
400
Mixing baking soda and vinegar is a chemical change that releases a gas called ____________________________.
Carbon dioxide
400
TRUE OR FALSE - Ice melting is an endothermic reaction.
TRUE - It's taking IN heat to melt the ice.
400
TRUE OR FALSE - Water freezing is exothermic.
TRUE - Heat is coming OUT of the water so it turns to ice.
400
Name two physical changes. Name two chemical changes.
Teacher decides if correct.
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