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- Multiple ChoicePlease save your changes before editing any questions.
The particles in solid, liquid and gas are always vibrating.
True
False
- Multiple ChoicePlease save your changes before editing any questions.
When heated, particles ____ energy, and vibrate ____ vigorously. The distance between particles _________.
lose, less, increases
gain, more, decreases
gain, more, increases
lose, less, decreases
- Multiple ChoicePlease save your changes before editing any questions.
When cooled, particles ____ energy, and vibrate ____ vigorously. The distance between particles _________.
lose, less, increases
gain, more, decreases
gain, more, increases
lose, less, decreases
- Multiple ChoicePlease save your changes before editing any questions.
Cold air is more dense than hot air.
True
False
- Multiple ChoicePlease save your changes before editing any questions.
Why does the temperature stay constant during freezing?
Heat energy absorbed is used to overcome very strong forces of attraction between solid particles
Heat energy is released as the particles overcome strong forces of attraction to form a solid
Heat energy is released as the particles move closer to each other to form a solid
Heat energy is absorbed as the particles move closer to each other to form a solid
- Multiple ChoicePlease save your changes before editing any questions.
Why does the temperature stay constant during boiling?
Heat energy is absorbed as the particles move closer to each other to form a gas
Heat energy is released as the particles overcome strong forces of attraction to form a gas
Heat energy absorbed is used to overcome strong forces of attraction between liquid particles
Heat energy is released as the particles move closer to each other to form a gas
- Open EndedPlease save your changes before editing any questions.
Why does a substance expand when heated?
- Multiple ChoicePlease save your changes before editing any questions.
When a liquid is heated it expands. Which statement is true about the particles?
The size of particles increases.
Distance between particles increases.
The size of particles increases.
Distance between particles does not change.
The size of particles does not change.
Distance between particles does not change.
The size of particles does not change.
Distance between particles increases.
- Multiple ChoicePlease save your changes before editing any questions.
When a substance is heated, its mass changes but its volume remains unchanged.
True
False
- Open EndedPlease save your changes before editing any questions.
Using the particulate theory of matter, explain what happens to a substance during melting.
- Multiple ChoicePlease save your changes before editing any questions.
Which solution has a lower concentration?
A
B
- Multiple ChoicePlease save your changes before editing any questions.
Diffusion is the net movement of particles from
a region of lower concentration to a region of higher concentration
a region of lesser concentration to a region of more concentration
a region of more concentration to a region of lesser concentration
a region of higher concentration to a region of lower concentration