P1 key questions
1 What is the equation linking kinetic energy, mass and velocity? Ek= 0.5mv2 Energy
2 What are the units of energy? joules Energy
3 What are the units of mass? kilograms Energy
4 What are the units of velocity? metres per second Energy
5 What is the equation linking gravitationa field strength, gravitational potential energy and height? Ep=mgh Energy
6 What are the units of gravitational field strength? newtons per kilogram Energy
7 What is the equation linking energy transferred, power and time? P=E/t Energy
8 What are the units of power? Watts Energy
9 What is the definition of power? Power is the rate of transfer of energy or the rate of doing work Energy
10 What is the equation linking power, time and work done? P=W/t Energy
11 What are the units of work done? joules Energy
12 What is the equation for calculating efficiency from energy? Efficiency = useful energy output/total energy input Energy
13 What is the equation for calculating efficiency from power? Efficiency = useful power output/useful power input Energy
14 What is the type of energy transferred when a force moves through a distance? Mechanical transfer Energy
15 Mechanical transfer is…? The energy transfer when a force moves through a distance Energy
16 Electrical transfer is…? energy transferred when a charge moves? Energy
17 What is the energy transferred when a charge moves? electrical transfer Energy
18 What is the energy transferred by electromagnetic radiation? Radiation transfer Energy
19 Radiation transfer is…? The energy transferred by electromagnetic radiation. Energy
20 Heat transfer is…? Energy transferred when an object is heated. Energy
21 When an object is heated the energy transferr is a…? heat transfer Energy
22 List the 4 energy transfer pathways. Mechanical, electrical, radiation and heat. Energy
23 List 4 energy stores. Four from: chemical, kinetic, gravitational potential, elastic potential, internal, nuclear, magnetic, electrostatic. Energy
24 Energy stored in objects which move. kinetic Energy
25 What is a kinetic energy store Energy stored in objects which move Energy
26 Chemical energy is stored as…? chemicals waiting to react Energy
27 A battery is a store of ….. energy. chemical Energy
28 Food is a store of ….. energy. chemical Energy
29 A moving object is a store of ….gravitational ptential store? energy storred in objects raised up against the force of gravity. Energy
31 A rock at the top of a hill is a store of …..energy. gravitational potential Energy
32 What is an elastic potential store? Energy stored in an object which has been stretched or compressed. Energy
33 A compressed spring is a store of …..energy elastic potential Energy
34 An inflated balloon is a store of ….. energy elastic potential Energy
35 The internal energy store is… energy stored in the movement of particles. Energy
36 The internal energy store of an object can be changed by…? heating or cooling Energy
37 Energy stored in the nuclei of atoms is in the …..store. nuclear Energy
38 What is a nuclear energy store? Energy stored in the nuclei of atoms that can fuse or split. Energy
39 What is the name of the process in which the nuclei of atoms fuse together? fusion Energy
40 What is the name of the process in which the nucleus of an atom splits? fisssion Energy
41 What is the magnetic energy store? Energy stored in magnets that are attracting or repelling Energy
42 What is the electrostatic energy store? Energy stored n electric charges that are attracting or repelling Energy
43 Name two non-renewable energy resources Fossil fuels, nuclear fuel Energy
44 What are some advantages of fossil fuels as an energy resource? reliable, cheap Energy
45 What is a reliable energy source one which can produce energy all the time. Energy
46 What are some disadvantages of fossil fuels? carbon dioxide (greenhouse gas) produced leading to global warming. Can produce sulphur dioxide causing acid rain. Energy
47 What are some advantages of nuclear fuel? No carbon dioxide produced, reliable. Energy
48 What are some disadvantages of nuclear fuel? nuclear waste remains radioactive for thousands of years. Expensive to build and decommission Energy
49 List 4 renewable energy resources. Any 4 from: biofuel, wind, hydroelectricity, geothermal, tidal, wave, solar. Energy
50 What are some advantages of biofuels? carbon neutral, reliable Energy
51 What are some disadvantages of biofuels? production of fuel can damage ecosystems and reduce variety of crops grown Energy
52 What are some advantages of wind power? No carbon dioxide produced Energy
53 What are some disadvantages of wind power? unreliable, expensive to construct Energy
54 What are some advantages of hydroelectricity? No carbon dioxide produced Energy
55 What are some disadvantages of hydroelectricty? blocks rivers preventing fish migration, unreliable (may not produce electricity during droughts) Energy
56 What are some advantages of geothermal energy? doesn't damage ecosystems, reliable. Energy
57 What are some disadvantages of geothermal energy? fluids drawn from ground may contain greenhouse gases such as CO2 and methane.These contribute to global warming Energy
58 What are some advantages of tidal energy? No carbon dioxide produced. Energy
59 What are some disadvantages of tidal energy? unreliable - tides vary, may damage tidal ecosystem Energy
60 What are some advantages of wave power? No carbon dioxide produced Energy
61 What are some disadvantages of wave power? unreliable - may not produce electricity when calm seas Energy
62 What are some advantages of solar power? No carbon dioxide produced Energy
63 What are some disadvantages of solar power? unreliable - no electricity produced at night and limited on cloudy days. Expensive to construct. Energy
64 What term is used to describe energy becoming spread out or transferred to a "wasted" store? dissipation Energy
65 What term is used to describe a method for reducing unwanted energy transfers by reducing friction? lubrication Energy
66 What is a thermal insulator? A non-conductive material which reduces thermal energy transfers. Energy
67 What is the name for a method of reducing energy transfers by the use of non-conductive materials? insulation Energy
68 What is the law of conservation of energy? Energy cannot be created and destroyed but only transferred from one store to another. Energy
69 Define specific heat capacity The energy needed to raise the temperature 1 kg of a material by 1ᵒC Energy