Energy S1

Question 1

What is a simple machine that can be used to lift heavier objects?

Answer 1

A lever

Question 2

How do you know that a beam is balanced?

Answer 2

For the beam to be balanced, the value of the mass multiplied by the distance from the pivot must be the same on both sides.

Question 3

Give an example of a balance equation

Answer 3

10g x 40cm = 20g x 20cm
30g x 30cm = 30g x 30cm
60g x 20cm = 20g x 60cm
50g x 20cm = 100g x 10cm

Question 4

What is energy measured in?

Answer 4

Joules

Question 5

What are 8 different forms of energy?

Answer 5

Kinetic, heat, light, sound, nuclear and the potentials gravity, gravitational, chemical and elastic..

Question 6

What are some examples of non-renewable energy sources?

Answer 6

Coal, natural gas, oil and nuclear energy.

Question 7

What are some examples of renewable energy sources?

Answer 7

Solar, tidal, wave, hydro,wind, biomass and geothermal

Question 8

What are some pros of hydro energy?

Answer 8

Its renewable, you can use it anywhere near with a river, good water supply, and attracts tourist and new wildlife.

Question 9

What are some cons of hydro energy?

Answer 9

It attracts invasive species, it destroys habitats, higher risk of flooding and expensive.

Question 10

What is the energy transfer for a kettle?

Answer 10

Electric -> Thermal

Question 11

What is the energy transfer for a light bulb?

Answer 11

Electric -> Light + Thermal

Question 12

What is the energy transfer for a wind turbine?

Answer 12

Kinetic energy -> Rotational energy

Question 13

What is a pulley?

Answer 13

A simple machine that can reduce the effort needed to lift a heavy object.

Question 14

What does a Sankey diagram show?

Answer 14

The proportion of energy transferred.