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Unit 1 REVIEW
Test Description: Unit test
Instructions: Answer all questions to get your test result.
1) What type of substance is described: particles have enough energy to break free from each other and can move around freely; particles spread out in different directions
A
Liquid
B
Solid
C
compound
D
Gas
2) Thermal energy is caused by the motion of
A
Molecules that have reached equilibrium.
B
Mixing water molecules contained in beaker.
C
Molecules in solid, liquid and gas phases.
D
Mixing two different molecules together.
3) The density of an object with a volume of 60.0 mL and a mass of 400.0 g is _____.
A
5.50g/mL
B
6.67g/mL
C
2.89g/mL
D
0.15g/mL
4) An ice cube, a glass of cold water, and a swimming pool are each exposed to the same amount of sunlight on a hot day. After five minutes, the ice cube is melted and the cold drink is two degrees warmer, the temperature of the swimming pool is unchang
A
The ice cube and the glass of water have lower heat capacities than the swimming pool.
B
The ice cube and the glass of water have higher heat capacities than the swimming pool.
C
The ice cube has a higher heat capacity than the glass of water and the pool.
D
The ice cube has a lower heat capacity than the glass of water and the pool
5) A banana turning brown when exposed to the air is an example of
A
a chemical change
B
vaporization
C
an amorphous solid
D
a heterogenous mixture
6) A puddle of water on the sidewalk evaporates and becomes water vapor. The water vapor travels through the air and comes into contact with a cold mirror. What happens next? Choose all that apply.
A
It becomes a gas
B
It becomes a solid
C
It becomes a liquid
D
The molecules lose energy
7) Why did a portion of the tabletop get cold when Natasha placed her cold drink on the table?
A
The table’s molecules had gained energy in that area.
B
The table’s molecules were vibrating more slowly in that area.
C
The table’s molecules had spread further apart in that area.
D
The table’s molecules had become free of each other in that area.
8) What fact does Antoine Lavoisier’s work show?
A
The overall thermal energy before a reaction is equal to the overall thermal energy after a reaction.
B
The overall temperature before a reaction is equal to the overall temperature after a reaction.
C
The overall volume before a reaction is equal to the overall volume after a reaction.
D
The overall mass before a reaction is equal to the overall mass after a reaction.
9) How do liquid water, ice, and water vapor differ from one another?
A
They are made of different kinds of atoms.
B
They are made of different kinds of molecules
C
They are different states of matter.
D
They are different compounds
10) Carl crumpled a piece of paper before throwing it into the trash can. Which is true about the paper after it was crumpled?
A
It's weight changed.
B
It's appearance changed.
C
It's density changed.
D
It's mass changed.
*select an answer for all questions
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