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Physical Science Flashcards

(27 cards)

1
Q

Solid

A

Fixed shape and volume; tightly packed particles that vibrate in place

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2
Q

Liquid

A

Definite volume but takes the shape of container; particles are loosely packed and flow past each other.

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3
Q

Gas

A

No fixed shape or volume; particles move freely and are far apart

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4
Q

Plasma (extra state)

A

high-energy state where electrons are stripped found in stars and lightning

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5
Q

physical change

A

changes appearance, not chemical identity (melting, boiling, freezing, dissolving)

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6
Q

chemical change

A

produces new substances (rusting, burning, baking a cake)

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7
Q

Temperature

A

measure of average kinetic energy of particles

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8
Q

heat

A

transfer of energy due to temperature difference

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9
Q

conduction

A

direct contact (pan or stove)

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10
Q

convection

A

movement in fluids (boiling water)

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11
Q

radiation

A

electromagnetic waves (sunlight)

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12
Q

Celsius

A

water freezes at 0 C, boils at 100 C

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13
Q

Fahrenheit

A

Water freezes at 32 F, boils at 212 F

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14
Q

Kelvin

A

Absolute zero is 0 K

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15
Q

molecule

A

two or more atoms bonded

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16
Q

homogeneous

A

uniform (salt water)

17
Q

heterogeneous

A

not uniform (salad)

18
Q

energy

A

ability to do work or cause change

19
Q

kinetic

A

energy of motion

20
Q

potential

A

stored energy

21
Q

thermal

22
Q

chemical

A

in chemical bonds

23
Q

mechanical

24
Q

electrical

A

flow of electrons

25
nuclear
from atomic nucleus
26
work
force x distance
27
unit
Joule (J)