Natural Science Grade 7 term 3&4 CAPS
Study online at https://quizlet.com/_2r661t
1. Energy The ability to do work
2. Work When something is moved
3. Law of the conserva- Energy cannot be created nor destroyed but only transferred within a
tion of energy system
4. Energy sources Sun
Wind
Fuel-fossil fuels wood food
Water
5. Sun as an energy Plants use solar energy for photosynthesis. Herbivores consume the
source plants or we do so .
6. Wind as an energy Moves boats with sails. Wind turbines can generate electricity or pump
source water.
7. Water as an energy Moving water can turn turbines which can generate electricity or grind in
source a mill.
8. Fuels Fossil fuels-oil coal natural gas
Wood and food
9. Non renewable Cannot be remade or cannot be replaced fast enough
10. Renewable Limitless amounts and can be remade quick enough
11. Types of energy Heat,electrical,kinetic,potential,light,sound,chemical and elastic
12. Potential energy Gravitational
Positional
Chemical
Elastic
1/5
, Natural Science Grade 7 term 3&4 CAPS
Study online at https://quizlet.com/_2r661t
13. Kinetic energy Movement
14. Elastic energy Tension
15. Electrical energy Electrons
16. Heat energy Degrees Celsius
17. Thermometer Measure temperature
18. Insulator Absorbs heat slowly and releases it quickly
19. Conductor Absorbs heat quickly and releases it slowly
20. Conduction Transfer of heat between solid via contact
21. Convection Transfer of heat in liquids and gases using the theory that hot gas/liquid
rises and cold gas/liquid sinks
22. Radiation Transfer of heat between 2 objects without any contact
23. Retaining heat in House built facing north
homes Few southern windows
Wooden frames for windows
Have windows glazed with glass
24. Energy conversions Input energy-electrical
Output- heat light sound
Wasted energy- heat
Useful energy- sound light
Example =Television
25. Dynamo Small generator making electrical energy using magnets and coiled
wire,input is always kinetic energy
2/5
Study online at https://quizlet.com/_2r661t
1. Energy The ability to do work
2. Work When something is moved
3. Law of the conserva- Energy cannot be created nor destroyed but only transferred within a
tion of energy system
4. Energy sources Sun
Wind
Fuel-fossil fuels wood food
Water
5. Sun as an energy Plants use solar energy for photosynthesis. Herbivores consume the
source plants or we do so .
6. Wind as an energy Moves boats with sails. Wind turbines can generate electricity or pump
source water.
7. Water as an energy Moving water can turn turbines which can generate electricity or grind in
source a mill.
8. Fuels Fossil fuels-oil coal natural gas
Wood and food
9. Non renewable Cannot be remade or cannot be replaced fast enough
10. Renewable Limitless amounts and can be remade quick enough
11. Types of energy Heat,electrical,kinetic,potential,light,sound,chemical and elastic
12. Potential energy Gravitational
Positional
Chemical
Elastic
1/5
, Natural Science Grade 7 term 3&4 CAPS
Study online at https://quizlet.com/_2r661t
13. Kinetic energy Movement
14. Elastic energy Tension
15. Electrical energy Electrons
16. Heat energy Degrees Celsius
17. Thermometer Measure temperature
18. Insulator Absorbs heat slowly and releases it quickly
19. Conductor Absorbs heat quickly and releases it slowly
20. Conduction Transfer of heat between solid via contact
21. Convection Transfer of heat in liquids and gases using the theory that hot gas/liquid
rises and cold gas/liquid sinks
22. Radiation Transfer of heat between 2 objects without any contact
23. Retaining heat in House built facing north
homes Few southern windows
Wooden frames for windows
Have windows glazed with glass
24. Energy conversions Input energy-electrical
Output- heat light sound
Wasted energy- heat
Useful energy- sound light
Example =Television
25. Dynamo Small generator making electrical energy using magnets and coiled
wire,input is always kinetic energy
2/5
