Energy

Question 1

Name 8 energy stores

Answer 1

1. Thermal
2. Kinetic
3. Gravitational potential
4. Elastic potential
   5.chemical
5. Electrostatic
   7.magnetic
6. Nuclear

Question 2

What are the 4 main ways energy is transferred?

Answer 2

1. Mechanically (by a force doing work)
   
   2. Electrically (by a moving charge)
   3. By heating (conduction, convection, radiation)
   4. By radiation (light, sound)

Question 3

What does a high specific heat capacity mean?

Answer 3

It takes more energy to heat up the material.

Question 4

Name 4 renewable and 3 non-renewable energy sources.

Answer 4

✅ Renewable: Solar, Wind, Hydroelectric, Geothermal, Tidal, Biomass
❌ Non-renewable: Coal, Oil, Natural Gas

Question 5

Name 4 renewable and 3 non-renewable energy sources.

Answer 5

✅ Renewable: Solar, Wind, Hydroelectric, Geothermal, Tidal, Biomass
❌ Non-renewable: Coal, Oil, Natural Gas

Question 6

What are the main advantages of renewable energy?

Answer 6

• Sustainable
• No greenhouse gases
• Low running costs

Question 7

What are the main advantages of renewable energy?

Answer 7

• Sustainable
• No greenhouse gases
• Low running costs

Question 8

What are the disadvantages of wind and solar power?

Answer 8

•Weather-dependent
•High initial costs
•Can take up large areas of land

Question 9

What type of energy is stored in a stretched rubber band?

Answer 9

Elastic potential energy

Question 10

How is energy transferred when a car brakes?

Answer 10

Mechanically from kinetic energy to thermal energy in the brakes due to friction

Question 11

What energy transfer happens in a battery-powered torch?

Answer 11

Chemical → Electrical → Light & Thermal

Question 12

Why do metals heat up faster than water?

Answer 12

Metals have a low specific heat capacity, so they require less energy to increase in temperature.

Question 13

What are the units of specific heat capacity?

Answer 13

Joules per kilogram per degree Celsius (J/kg°C)