Energy

Question 0

What is kinetic energy?

Answer 0

Energy of a moving object.

Question 1

What is energy?

Answer 1

The ability to do work.

Question 2

What is potential energy?

Answer 2

Stored energy

Question 3

What is chemical energy?

Answer 3

Form of potential energy, fuels, food, batteries

Question 4

What is nuclear energy?

Answer 4

Energy stored in substances such uranium, plutonium, radiume

Question 5

What is meant by elastic potential energy?

Answer 5

Stored energy when an object is stretched

Question 6

What is gravitational potential energy?

Answer 6

Stored energy when an object is raised.

Question 7

What are the type of waves that contain kinetic energy released by the sun?

Answer 7

Electromagnetic waves

Question 8

Does sound travel through solids?

Answer 8

Yes, even faster than gasses.

Question 9

Does sound travel through liquids?

Answer 9

Yes, slower than solids.

Question 10

Does sound travel through gasses?

Answer 10

Yes, slower than liquids.

Question 11

Does sound travel through a vacuum.

Answer 11

No

Question 12

Would sound travel through solids faster than through liquids and gasses?

Answer 12

Yes because the particles are much closer together

Question 13

Would sound travel at the same speed through a gas at different temperatures?

Answer 13

No because it travels through the colder particles faster because they are closer together

Question 14

Which travels faster: light or sound?

Answer 14

Light

Question 15

Why does light faster than sound?

Answer 15

Because you can always see something before you hear it.
Speed of sound: 330 metres per second
Speed of light: 300,000,000 metres per second

Question 16

If a massive explosion occurred on the moon, would you see it, hear it, both or neither back on earth?

Answer 16

You would only see it. There’s no air in space.

Question 17

In general, what type of material makes a good conductor of heat?

Answer 17

Metal

Question 18

Which materials are poor conductors of heat?

Answer 18

Glass, wood, plastic

Question 19

Are the abilities to conduct heat and light related?

Answer 19

Yes, because metals are good at conducting heat and energy.

Question 20

Heat energy can move through substances using what three different methods?

Answer 20

Conduction, convection and radiation.

Heat always moves from hot to cold.

Question 21

What is Conduction?

Answer 21

The process by which heat energy moves through solid materials.

Question 22

How does conduction work?

Answer 22

Heat energy makes the particles vibrate. These particles make neighbouring particles vibrate so the heat energy is transferred throughout the material.

Question 23

What is convection?

Answer 23

The process by which heat energy moves through liquids and gasses.

Question 24

How does convection work?

Answer 24

As the gasses and liquids are heated, the particles move further apart and become less dense. This will rise through the cooler surrounding particles.

Question 25

What is radiation.

Answer 25

The process by which heat energy moves through a vacuum (like in space) and between air particles. Heat will travel in a straight line at high speed when traveling through space.

Question 26

Heat always moves from higher_____to lower_____.

Answer 26

Temperature.

Question 27

The state of matter that conduction occurs in.

Answer 27

Solids

Question 28

The method by which heat is able to move liquids and gasses

Answer 28

Convection

Question 29

When water is heated it moved in this direction

Answer 29

Upward

Question 30

The movement of particles in a liquid or gas when being heated is called a convection_____.

Answer 30

Current

Question 31

The process of heat transfer that moves between air

Answer 31

Radiation

Question 32

Which colour cars would be better in hot climates

Answer 32

Light and shiny | Reflects well, absorbs poorly

Question 33

Why do saucepans have plastic handles

Answer 33

So the heat will not be conducted through the handle | Plastic's a good insulator

Question 34

In colder climates, why is it useful to have insulation in the roof?

Answer 34

Insulation traps heat inside building because it's a poor conductor

Question 35

Why are circulation systems for swimming pools made of black plastic piping?

Answer 35

Absorbs heat from the sun

Question 36

What is work?

Answer 36

Using energy to move something over a distance

Question 37

What is renewable energy?

Answer 37

Energy that is easily replenished for example solar and wind energy

Question 38

What is non-renewable energy?

Answer 38

Energy that are not easily replenished, for example, fossil fuels

Question 39

What is a dependant variable?

Answer 39

A variable that is depends on another The dependent you measure On the Y axis

Question 40

What is an independent variable?

Answer 40

A variable that doesn't depend on another The variable you change On X axis

Question 41

What is a controlled variable?

Answer 41

The variable you keep the same.

Question 42

What is a hypothesis?

Answer 42

A sentience that states how the independent variable affects the dependent variable.