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Science > Yr9 Semester 1 > Flashcards

Yr9 Semester 1 Flashcards

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1
Q

Define energy

A

Particle movement or wave motion

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2
Q

Define media

A

Medium (environment such as air, water or even empty space)

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3
Q

What is the kinetic theory of matter

A
  • particles are always in motion
  • there are forces of attraction between particles
  • there is empty space between particles
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4
Q

Define Celsius

A

A measure or average kinetic energy

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5
Q

Define kelvin

A

A measure of particles

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6
Q

What is the term for solid-liquid

A

Fusion

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7
Q

Term for liquid-gas

A

Evaporation (boiling=vaporization)

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8
Q

Term for gas-liquid

A

Condensation

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9
Q

Term for liquid-solid

A

Solidification

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10
Q

Term for solid-gas

A

Sublimation

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11
Q

Term for gas-solid

A

Deposition

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12
Q

How does heat move

A

Hot-cold

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13
Q

What is absolute zero

A

0k or -273.15°c (no particle motion)

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14
Q

Define conduction

A

Heat or electricity is directly transmitted through the material of a substance

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15
Q

Define convection

A

When warmer parts move up because they are more dense and the cooler parts move down because of convection currents

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16
Q

Define radiation

A

Thermal energy is exchanged between two surfaces obeying the laws of electromagnetics

17
Q

What are insulators

A

Things that are poor conductors. Can block heat transfer completely

18
Q

What are conductors

A

Materials that transfer heat easily

19
Q

What is sound

A

A vibration that typically propagates as an audible wave of pressure.

20
Q

What sound does small compressions make

A

Soft sound

21
Q

What sound does big compressions make

A

Loud sounds

22
Q

What happens if you have a high frequency compared to a low frequency

A

High frequency = high pitch

Low frequency = low pitch

23
Q

Define frequency

A

Number of full cycles per second

24
Q

What is refraction

A

The bending of light

25
Q

Define luminous

A

An object that reflects light

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