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- 1. Multiple Choice
What is a solid?
particles that are tightly compacted
particles that are not tightly compacted
- 2. Multiple Choice
what is a liquid?
a substance that flows freely but is of constant volume
a substance or matter in a state in which it will expand freely
firm and stable in shape
- 3. Multiple Choice
what is a gas?
a substance or matter in a state in which it will expand freely to fill the whole of a container
the basic unit of a chemical element
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 4. Multiple Choice
How would you describe the way molecules move when the molecules are solid?
the molecules are moving in place.
the molecules are moving around each other.
the molecules are moving away from each other.
the molecules are not moving
- 5. Multiple Choice
Molecules are always moving no matter what phase they are in: solid, liquid, gas.
True
False
- 6. Multiple ChoiceSolid, liquid and gas are examples of?phasestemperaturescalerefute
- 7. Multiple Choice
A phase change can be observed at the molecular scale and can be explained at the macro-scale.
True
False
- 8. Multiple Choice
What happens to molecules when the temperature drops or lowers?
The molecules get closer together
The molecules start moving faster.
The molecules stop moving.
The molecules become smaller.
- 9. Multiple Choice
When a substance melts, the kinetic energy _____________.decreasesstays the sameincreasesdecreases then increases - 10. Multiple ChoiceWhat takes place when a solid changes to a liquid?condensationfreezingmeltingevaporation
- Answer choicesTagsAnswer choicesTags