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REVIEW J.U3L3-Thermal Energy + Chemical Processes
Test Description: Quiz prep
Instructions: Answer all questions to get your test result.
1) Which of these is EVIDENCE of a chemical reaction that releases energy?
A
photosynthesis
B
boiling water
C
burning wood
D
melting ice cubes
2) Which of these is EVIDENCE of a reaction that absorbs energy?
A
a piece of wood smoldering
B
a firework exploding
C
a cake baking
D
a candle burning
3) What is your CLAIM about what can happen when energy is transferred from one system to another?
A
The energy changes form.
B
Some energy is destroyed.
C
The energy changes into mass.
D
New energy is created.
4) A burning candle is an example of a chemical reaction taking place. What can be inferred about this reaction?
A
The reaction absorbs energy.
B
There are reactants but no products.
C
Mass is not conserved.
D
The reaction releases energy.
5) The graph represents energy changes that occur during a chemical reaction. Your CLAIM? The energy is higher at the start. Your CLAIM?
A
The reaction destroys energy.
B
The reaction releases energy.
C
The reaction does not involve energy.
D
The reaction cannot possibly release energy.
6) What REASONING explains why increasing temperature generally increases the rate of a chemical reaction?
A
It decreases the size of the reactant particles.
B
It increases the amount of reactant.
C
It increases the space between reactant particles so they have more room to move apart.
D
It causes the particles of the reactants to move faster and collide more often.
7) The diagram shows what happens before and after two unknown substances are mixed. The left beaker holds warmer water; the right is colder with gas.
A
The reaction releases energy.
B
The reaction destroys energy.
C
The reaction does not involve energy transfer.
D
The reaction absorbs energy. (from the surrounding hot water)
8) Energy ALWAYS TRAVELS from -- to --.
A
up to down
B
cold to hot
C
both ways
D
HOT TO cold
9) Energy is released because the end of the graph is at a lower energy level than the beginning. Your REASONING is T or F?
A
False
B
TRUE
C
Energy is released only when there is fire.
D
Energy is absorbed
10) You pick up a hot mug on a cold day and thankfully feel its heat in your hands. Your CLAIM will relate to which form of heat transfer?
A
radiation
B
conduction
C
space
D
convection
*select an answer for all questions
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