P1 year 9

Question 1

Efficiency?

Answer 1

Useful output/total output

Question 2

Gravitational potential energy?

Answer 2

Mass(kg) x gravitational field strength(Earth=10N/kg) x height(m)

Question 3

Kinetic energy?

Answer 3

1/2 mass(kg) x velocity(m/s)^2

Question 4

Elastic potential energy?

Answer 4

0.5 x k(constant)(N/m) x e^2

Question 5

Work done (j)?

Answer 5

Force(N) x distance(m)

Question 6

Power (W)?

Answer 6

Energy (J) / time (s)

Question 7

Energy stores?(8)

Answer 7

Kinetic, gpe, chemical, thermal, light, elastic potential, electrostatic , nuclear

Question 8

Energy pathways? (4)

Answer 8

Heating, electrical (current), physical(work), electromagnetic (radiation)

Question 9

Renewable resources?(5)

Answer 9

Geothermal, wind, waves, solar, biofuel

Question 10

Non renewable resources?(2)

Answer 10

Nuclear, fossil fuels

Question 11

What is geothermal?

Answer 11

Energy resource which requires using heat from hot rockets in the earths crust to create energy.

Question 12

What is biofuel?

Answer 12

Energy from living matter

Question 13

What is energy dissipation?

Answer 13

When wasted energy dissipates into the environment

Question 14

What is the difference between the greenhouse effect and global warming?

Answer 14

The greenhouse effect is the earths natural process of warming up the earth using gases and global warming is when there is excess gases

Question 15

What are the downsides to fossil fuels

Answer 15

Releases carbon dioxide ( climate change) sulphur dioxide (acid rain) and nitrogen oxide (lung)

Question 16

Biomass?

Answer 16

Chemical energy from plants from photosynthesis