Page 131 - Knowledge Organiser Yr9 24-25

Knowledge Base: Science P1: Energy Year 9
1.14
What stores of energy change when a vehicle slows down?
Kinetic store decreases, thermal store increases.
1.15
What stores of energy change when water is brought to the boil in a kettle?
Chemical store decreases, thermal store increases.
1. Energy Stores
1.1 What is energy?
1.2 What is the unit of energy?
The ability to do work.
Joules (J).
1.3
Name 8 stores of energy.
Kinetic, gravitational potential, chemical, elastic, magnetic, electrostatic, nuclear, thermal.
1.4
What store of energy would an object have if it is raised off the floor?
Gravitational potential.
1.5
What store of energy would an object have if it is moving?
Kinetic.
1.6
What store of energy would an object have because of the chemical bonds it has?
Chemical.
1.7
What store of energy would an object have because of its temperature?
Thermal.
1.8
What store of energy would an object have if it has been stretched or squashed?
Elastic potential.
1.9
What store of energy is present in food, our bodies, batteries and fuels?
Chemical.
2. Energy Transfers
2.1
Name four ways energy can be transferred in a system.
1. Heating
2. Work done by forces (mechanical) 3. Work done when a current flows
(electrical) 4. Radiation
2.2
What transfer would take place when energy is transferred in a batterypowered torch to the bulb when it is switched on?
Work done when a current flows (electrical).
2.3
What transfer would take place when energy is transferred as you throw a ball into the air?
Work done by forces (mechanical).
2.4
What energy transfer would take place when a hot cup of tea transfers energy to the surroundings?
Heating.
2.5
What energy transfer takes place when a TV screen transfers energy to the surroundings because light and sound are being emitted?
Radiation.
1.10 What is a system?
An object or group of objects.
1.11
What stores of energy change when an object is projected upwards?
Gravitational potential store increases, chemical store decreases.
1.12
What stores of energy change when a moving objects hits an obstacle?
Kinetic store decreases, thermal store increases, kinetic store of obstacle may increase.
1.13
What stores of energy change when an objected is accelerated with a constant force?
Kinetic store increases, chemical store decreases.
chemical store
electrical transfer
kinetic store
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