Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science > Yr 8 Physics > Flashcards

Yr 8 Physics Flashcards

1
Q

Identify the type of heat transfer:
A room becomes warm after the heater is turned on

A

Convection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How does radiation transfer heat energy?

A

Heat Waves, spreads outwards to transfer heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Energy flow diagram for releasing a bow and arrow

A

Elastic potential energy -> kinetic energy -> kinetic energy and gravitational potential energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What state of matter does convection occur in?

A

Liquids and gases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why can’t you hear heels on carpet?

A

The sound energy from both the objects cancel each other out. The carpet also absorbs the sound energy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What’s the formula for Gravitational potential energy

A

GPE= m x g x h
(mass by gravity by height)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Convert g to kg

A

divide by 100

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Identify the type of heat transfer:
A kettle is turned on and the water is boiled

A

Convection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How do you find kinetic energy?

A

GPE of point A - GPE of point B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Define conduction

A

Conduction happens when two objects are in contact with each other, or when a heat source is in direct contact with a material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Sound energy is a form of what kind of energy?

A

Kinetic energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is sound transmission?

A

the spread of sounds through materials and air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Convert j to jk

A

divide by 1000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

List some examples of things or objects that use echo-location.

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Energy flow diagram for a light bulb turning on

A

Chemical potential energy -> Electrical energy -> Light and heat energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What state of matter does conduction happen in?

A

Solids

17
Q

Define Insulation

A

Insulation isa material that resists or blocks the flow of heat energy (opposite of conduction/convection)

18
Q

Contrast heat and sound energy

A
19
Q

A saucepan on a stovetop is filled with water. Once left for a while, the water begins to boil.

a. Identify the types of heat transfer involved in this situation.

b. Explain why the water is able to heat up and boil.

A

a. Both conduction and convection

b. Conduction is heating the pot which is then heating the water inside causing it to boil

20
Q

How does sound energy travel?

A

sound waves

21
Q

What is the Law of Conservation of Energy?

A

Energy cannot be created or destroyed

22
Q

What’s the formula for energy efficacy?

A

used energy/total energy x 100

Science (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions