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WorksheetsEnergy in Chemical Reactions
Total questions: 15
Worksheet time: 12mins
What is the measure of how fast molecules are moving?
Speedometer
Volume
Temperature
Thermometer
The substances present BEFORE a reaction occurs are called______.
Products
Exponents
Factors
Reactants
What is the substance present at the END of a reaction called?
Product
Exponent
Integer
Reactant
How do you know baking a cake is a chemical reaction?
It tastes yummy.
A new substance is formed.
You mixed it together.
It has ingredients.
In EXOTHERMIC reactions, energy is _____ from the reaction to the surroundings.
Absorbed
Released
Eliminated
Evaporated
In ENDOTHERMIC reactions, energy is _____ by the reaction system from the surroundings.
Absorbed
Released
Eliminated
Obliterated
What usually happens to TEMPERATURE in an ENDOthermic reaction?
Increases
Decreases
Stays the same
Temperature usually _____ in EXOthermic reactions.
Stays the same
Increases
Decreases
Photosynthesis is an _____ reaction.
EXOthermic
ENDOthermic
Cooking and baking are _____ reactions.
EXOthermic
ENDOthermic
Fireworks are an _____ reaction.
EXOthermic
ENDOthermic
The starting temperature of a reaction was 21 degrees Celsius and the ending temperature was 44 degrees Celsius. What type of reaction occurred?
EXOthermic
ENDOthermic
A chemist is doing an ENDOthermic reaction. The starting temperature was 25 degrees Celsius. Which of the following would be a reasonable ending temperature
44 degrees
30 degrees
15 degrees
25 degrees
If a chemical reaction produces light or sound, it is likely a _____ reaction.
EXOthermic
ENDOthermic
Making ice (freezing liquid water) is a _________ reaction.
EXOthermic
ENDOthermic
