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1-3 Test
Test Description: Investigate and measure the effects of increasing or decreasing amounts of energy during a physical or chemical change
Instructions: Answer all questions to get your test result.
1) What must often be added to increase the speed or ability of 2 substances to react?
A
More substances
B
Adding heat
C
Adding water
D
A bigger container
2) Which physical change does a swamp cooler use to cool the air?
A
Liquid to solid
B
Gas to liquid
C
Liquid to gas
D
Solid to liquid
3) Which if these is an example of energy involved in a chemical change?
A
Freezing an ice cube
B
Burning a candle
C
Dropping a rock
D
Heating a burner on stove top
4) Toni & Juan decide to do an experiment where one will drop food coloring into hot water; the other will do the same in cold water. Based on your knowledge of energy, predict the results
A
The coloring will move through both containers of water at the same speed because water always has the same energy
B
The coloring will move through the cold water faster because cold water has more energy
C
The coloring will float on top of the water until you put energy into it by stirring it
D
The coloring will move through the hot water faster because hot water has more energy
5) How does adding heat affect liquid water?
A
It becomes a solid
B
A color change is produced
C
Its molecules move faster
D
New substances form
6) Which of the following is an example of how understanding chemical change helps people?
A
Increasing crop production allowed a rise in human populations
B
The invention of plastics allowed new ways of making things
C
The launching of weather ballons made better weather forecasts
D
Underwater submarines discovered seafloor mountains
7) What does liquid water need to change into water vapor?
A
Stirring
B
A thermometer
C
A test tube
D
Heat energy
8) The boiling point of water at sea level is 100 degrees Celsius. What phase would you expect water to be in if it were heated to 110 degrees Celsius?
A
Plasma, because all of the molecules have enough energy to glow
B
Liquid, because some of the molecules are still boiling at 110 degrees
C
Gas, because all the molecules have enough energy to have escaped at 110 degrees
D
Solid, because the molecules are moving more slowly
9) When lighting a match, why must it be drawn rapidly along a rough surface?
A
The rough surface shortens the match
B
To provide an electrical spark
C
To provide heat to start the reaction
D
It is traditional
10) As warm air rises, it cools, condenses and freezes in the upper atmosphere. What happens as it falls back to Earth?
A
It undergoes a chemical change from a solid to a liquid
B
It undergoes no chemical or physical change
C
It undergoes a physical change from a solid to a liquid
D
It undergoes a chemical change from a solid to a gas
*select an answer for all questions
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