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Change & Energy
Test Description: Energy changes involved in chemical and physical change
Instructions: Answer all questions to get your test result.
1) What often happens when a chemical or physical change occurs?
A
changes in energy
B
changes in mass
C
changes in size
D
changes in color
2) What must often be added to increase the speed or ability of two substances to react?
A
adding heat
B
adding water
C
more substances
D
a bigger container
3) What kinds of energy are produced by bright fireworks?
A
sound, magnetism
B
electricity, steam
C
light, heat
D
motion, gravity
4) Which of these is an example of energy involved in a chemical change?
A
dropping a rock
B
freezing an ice cube
C
heating a burner on a stove top
D
burning a candle
5) How does adding heat affect liquid water?
A
it becomes a solid
B
new substances form
C
a color change is produced
D
its molecules move faster
6) What does liquid water need to change into water vapor?
A
a test tube
B
heat energy
C
a thermometer
D
stirring
7) What would you be expecting water to do at 100C?
A
freezing
B
boiling
C
condensing
D
shaking
8) An exothermic reaction:
A
shines brightly
B
releases heat energy
C
emits loud noises
D
absorbs heat energy
9) When lighting a match, why must it be drawn rapidly along a rough surface?
A
to provide heat to start the reaction
B
it is traditional
C
to provide an electrical spark
D
the rough surface shortens the match
10) What energy is required in order for photosynthesis to occur?
A
none, it is spontaneous
B
sunlight
C
heat
D
electrical spark
*select an answer for all questions
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