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- 1. Multiple Choice
What is the best evidence that an exothermic reaction occurred in the beaker?
color change
the temperature increased
odor
mass decreased
- 2. Multiple Choice
What is the best evidence that an endothermic reaction occurred in the beaker?
color
odor
temperature decreased
gas
- 3. Multiple Choice
What evidence in the picture indicates that a chemical change occurred?
temperature change
odor
gas
- 4. Multiple Choice
What state of matter is image 3?
solid
liquid
gas
- 5. Multiple Choice
Heat will continue to transfer between two areas or objects until
melting point is reached
the colder object absorbs all the heat energy
both objects are the same temperature
all heat is lost to the air
- 6. Multiple Choice
Table salt is edible, therefore the elements that make up table salt must be edible. True or False
true
false
- 7. Multiple Choice
How does thermal energy move?
cold to warmer objects
warmer to cooler objects
solids to liquids
- 8. Multiple Choice
Hot air rises because it is ___________ dense than cooler air
more
less
- 9. Multiple Choice
Mrs. Logan bought a bag of m&m's and carried them home from the store on a hot day. When she got home her candy had begin to melt. Why?
heat transferred from the candy to the bag
heat evaporated from the bag to the candy
heat transferred from the environment to the candy
heat condensed from her hand
- 10. Multiple Choice
Which of the following is true? Choose one answer.
Aluminum is a conductor of heat. Plastic is an insulator (but not as good as foam).
Plastic is a conductor. Aluminum is an insulator.
both aluminum and plastic are good conductors of heat
both aluminum and plastic are insulators.
- 11. Multiple Choice
Styrofoam is best for serving hot cocoa and a milkshake because foam is a(an) ________________.
conductor
insulator
- 12. Multiple Choice
Energy is absorbed by the reaction from the surroundings
endothermic
exothermic
- 13. Multiple Choice
Energy is transferred from the reaction to the surroundings as heat is released
endothermic
exothermic
- 14. Multiple Choice
Which of the following statements is correct about the picture?
2 oxygen atoms are in the reactant and 3 oxygen atoms are in the product, therefore this is NOT a balanced equation.
this equation is balanced based on the image shown
- 15. Multiple Choice
According to the law of conservation of mass, matter cannot be created or destroyed. Which of the following is true?
a
b
c
d
- 16. Multiple Choice
Which of the following is true
Dissolving candy is a physical change because a new substance is NOT formed, this can be reversed.
Dissolving candy is a physical change because the color changed
Dissolving is a chemical change because its irreversible
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