Top 1 - Energy

Question 1

Give four energy stores.

Answer 1

Kinetic
Elastic
GPE
Thermal

Question 2

Describe how energy is transferred as a ball falls to the ground.

Answer 2

It goes from the GPE store inside the ball to the kinetic energy store.

Question 3

Give the word equation for calculating the amount of energy in an object kinetic energy store.

Answer 3

Kinetic energy = 0.5 x Mass x (speed x speed)

Question 4

Give the equation for finding the energy in a objects gravitational potential energy store.

Answer 4

Gravitational potential energy = mass x gravitational field strength x height

Question 5

What is the definition of the specific heat capacity of a material?

Answer 5

How difficult or easy it is to heat an object to a set heat.

Question 6

State the conservation of energy principle.

Answer 6

Energy can be transferred usefully, stored or dissipated, but can never be created or destroyed.

Question 7

Give three equations that involve power.

Answer 7

Power = Potential difference x current
Power = (current x current) x resistance
Energy transferred = charge flow x potential difference

Question 8

Give four ways to prevent unwanted energy transfers in a home.

Answer 8

Double / Triple Glazed windows.
Draught excluders around doors and windows
Cavity Walls
Loft insulation

Question 9

Name four renewable energy resources and four non-renewable energy resources.

Answer 9

Wind / Solar / Hydraulic / Geothermal

Coal / Oil / Natural Gases / Nuclear

Question 10

Give one environmental benefit of using nuclear power.

Answer 10

Less use of fossil fuels means lowering the greenhouse gas emissions