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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
melting ice cubes
B
photosynthesis
C
boiling water
D
burning wood
2) Which of these is EVIDENCE of a reaction that absorbs energy?
A
a piece of wood smoldering
B
a candle burning
C
a cake baking
D
a firework exploding
3) What is your CLAIM about what can happen when energy is transferred from one system to another?
A
New energy is created.
B
The energy changes form.
C
The energy changes into mass.
D
Some energy is destroyed.
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
The reaction releases energy.
C
Mass is not conserved.
D
There are reactants but no products.
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 does not involve energy.
C
The reaction releases 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 causes the particles of the reactants to move faster and collide more often.
C
It increases the space between reactant particles so they have more room to move apart.
D
It increases the amount of reactant.
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 destroys energy.
B
The reaction does not involve energy transfer.
C
The reaction absorbs energy. (from the surrounding hot water)
D
The reaction releases energy.
8) Energy ALWAYS TRAVELS from -- to --.
A
both ways
B
HOT TO cold
C
cold to hot
D
up to down
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
Energy is absorbed
B
TRUE
C
False
D
Energy is released only when there is fire.
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
convection
B
conduction
C
space
D
radiation
*select an answer for all questions
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