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Flashcards in physics-energy Deck (24)
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1

True or false

Non-renewable energy sources such as fossil feels will run out

True

2

Name 3 renewable energy sources

Wind, hydroelectric, tidal,waves,geothermal,solar,food,wood

3

What is the most important type of energy we need to generate

Electrical energy

4

Name the different types of energy

Heat
Elastic
Chemical
Kinetic
Light
Electrical
Gravitational
Sound

5

Describe the correlation between the mass of an object and the speed

Heavier objects will move faster

6

Which type of energy do all moving things have

Kinetic energy

7

What object would have more internal energy a hot cup of tea or a cold cup of tea

A hot cup of tea

8

Which energy is stored in stretched or squashed materials

Elastic potential energy

9

Name 4 ways energy can be transferred

Heating
Mechanically
Electrically
Radiation

10

True or false

Does the heat energy transfer from the hotter object to the cooler object

True

11

Name the types of waves that transfer energy through materials and form place to place

Sound and seismic waves formed during earthquakes

12

How is electrical energy transferred

Electrical energy is transferred when a circuit is complete

13

Names the waves and light that are forms of radiation

Visible light, Infrared light, microwaves and radio waves

14

When an object falls what energy is converted to kinetic energy

Gravitational potential energy the object possessed

15

Energy can be stored and transferred but what two things can it not be

Created or destroyed

16

The total energy stays the same value before and after arch fe what is this called

The conservation of energy

17

What is the diagram called that shows energy transfers

A sankey diagram

18

How can energy stored in food be released

By combustion

19

What is the unit for energy on food labels

Kj (kilojoules)

20

What describes the rate of energy that is used

Power

21

What does W stand for

Watt

22

What is the equation for energy costs

Energy in kWh = power in kW multiplied by time in hours

23

What is cheaper gas per kW or electricity per kW

Gas

24

What is the ultimate source of energy on the earth

The sun