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Eighth Grade Science > Phase Change and Heat Energy > Flashcards

Phase Change and Heat Energy Flashcards

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Biology 101 flashcards
1
Q

Solid

A

Molecules are close together
Low energy
Defined shape and volume
Vibrate in place
Crystalline solid

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2
Q

Liquid

A

Defined volume
Take the shape of container
Fluid
Particles slide past one another
Greater energy than a solid

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3
Q

Gas

A

No definite shape or volume
Spread out to fill the space given
Particles are far apart and collide frequently
Have lots of energy

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4
Q

Phase Change

A

Change from one state of matter to another

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5
Q

Heat

A

Flow of energy from a warmer object to a colder object.
Heat always travels hot to cold

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6
Q

Melting

A

Solid to a liquid
Heat energy is absorbed
Molecules speed up and spread apart

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7
Q

Freezing

A

Liquid to solid
Heat energy is released
Molecules slow down and move closer together

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8
Q

Vaporization

A

Liquid to Gas-At boiling point
Heat energy is absorbed
Molecules speed up and spread apart

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9
Q

Evaporation

A

Liquid to Gas-Only surface molecules
Heat energy is absorbed
Molecules speed up and spread apart

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10
Q

Condensation

A

Gas to liquid
Heat energy is released
Molecules slow down and move closer together

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11
Q

Sublimation

A

Solid to gas
Heat energy is absorbed
Molecules speed up and spread apart

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12
Q

Deposition

A

Gas to solid
Heat energy is released
Molecules slow down and move closer together

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13
Q

Conduction

A

Transfer of heat energy from one object to another by touch

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14
Q

Convection

A

Transfer of heat by the movement of particles caused by differences in heat and density

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15
Q

Radiation

A

Heat energy transferred by electromagnetic waves

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16
Q

Temperature

A

The measure of the average kinetic energy of the particles in a material

17
Q

Kinetic Energy

A

Energy due to motion

18
Q

Density

A

The mass per unit of volume

19
Q

Density Formula

A

Density=mass/volume

20
Q

Density and Phase change

A

Solid to liquid or Liquid to Gas- Density decreases
Liquid to solid or Gas to Liquid- Density increase

21
Q

Kinetic Theory of Matter

A

Matter is made of particles that are in continual random motion.

Eighth Grade Science (3 decks)

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