Question 1
Question
Convection is the main form of heat transfer in...............?
Question 2
Question
The [blank_start]bigger[blank_end] the temperature difference, the faster the heat transfer.
Question 3
Question
Which of these surfaces are good at absorbing & emitting IR radiation?
Question 4
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Conduction is faster in denser solids because the particles are closer together and will collide more often.
Question 5
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Why are metals good conductors?
Answer
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Because they have free electrons
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Because their particles are closer together
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Because their particles move faster
Question 6
Question
Why does water become less dense when it is heated?
Answer
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Because the particles gain heat energy and spread apart
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The heat makes the particles lighter
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Because the particles lose heat energy and spread apart
Question 7
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The fastest particles are most likely to evaporate, [blank_start]decreasing[blank_end] the average speed of the remaining particles.
Question 8
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The rate of condensation will be faster if.........
Question 9
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The larger the surface area, the [blank_start]faster[blank_end] the heat transfer.
Question 10
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Why are the walls of a vacuum flask silvered?
Answer
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To reduce heat loss by radiation
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To reduce heat loss by conduction
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To reduce heat loss by convection
Question 11
Question
How do you work out payback time?
Question 12
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The better the insulator, the [blank_start]lower[blank_end] the U-value.
Question 13
Question
What are the units for Specific Heat Capacity?
Question 14
Question
Conservation of Energy Principle: Energy can be transferred, stored or dissipated but it can never be [blank_start]created[blank_end] or destroyed.
Question 15
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Energy is most often lost as......
Question 16
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What are the standard units for electrical energy?
Question 17
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What effect can access to electricity have on standard of living?
Answer
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Public health
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Communications
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Malnutrition
Question 18
Question
Which of these represents the energy transfer when burning a fossil fuel to generate electricity?
Answer
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Chemical ---> Heat ---> Kinetic ---> Electrical
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Heat ---> Kinetic ---> Chemical ---> Electrical
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Chemical ---> Kinetic ---> Heat ---> Electrical
Question 19
Question
Which of these renewable energy sources cause permanent damage to the landscape?
Answer
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Wind power
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Solar power
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Hydroelectric power
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Tidal power
Question 20
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Which of these is the main advantage of HEP?
Question 21
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Wave power can be harnessed by using the [blank_start]up and down[blank_end] motion of the waves to drive a generator.
Answer
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up and down
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side to side
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up
Question 22
Question
Which of these is a major disadvantage of geothermal energy?
Answer
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It can only be done in a few locations
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It is difficult to use the energy
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It produces a lot of polluting gases
Question 23
Question
Which of these power stations takes the least amount of time to set up?
Answer
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Natural gas
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Oil
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Coal
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Nuclear
Question 24
Question
How do biofuels harm the environment?
Answer
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They are 'carbon neutral'
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They require clearance of large areas of forest
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They release a lot of methane when the plants grow
Question 25
Question
Where is captured carbon dioxide pumped to in CCS?
Answer
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Empty gas & oil fields
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The ocean
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The atmosphere
Question 26
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What is the National Grid?
Answer
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A system of cables and pylons
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A system of cables and transformers
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A system of cables, transformers and power stations
Question 27
Question
How can our demand for electricity be reduced?
Answer
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Consumers using more energy-efficient appliances
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Being more careful not to waste energy in the home
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Opening more power plants
Question 28
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Frequency is the number of waves produced in one [blank_start]second[blank_end].
Question 29
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Sound waves are an example of a transverse wave.
Question 30
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Angle of incidence [blank_start]equals[blank_end] angle of reflection.
Question 31
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Which of these describe the image in a plane mirror?
Answer
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Same size as object
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Bigger than object
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Virtual
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Real
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Upright
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Upside down
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Laterally inverted
Question 32
Question
In diffraction, the narrower the gap, the [blank_start]more[blank_end] the wave spreads out.
Question 33
Question
What happens when a wave travels along the normal?
Question 34
Question
What is the approximate range of wavelengths of electromagnetic waves?
Answer
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10^−15 metres to 10^4 metres
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10^−4 metres to 10^15 metres
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10^−6 metres to 10^6 metres
Question 35
Question
How are long-wave radio waves (1-10 km) transmitted?
Question 36
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The higher the frequency of a wave, the [blank_start]shorter[blank_end] the wavelength.
Question 37
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Which of these are uses of Infrared waves?
Answer
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Satellite communication
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Mobile phones
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Remote controls
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Optical fibres
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Photography
Question 38
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The bigger the amplitude, the [blank_start]louder[blank_end] the sound.
Question 39
Question
When we look at light from distant galaxies we see the same patterns but at slightly [blank_start]lower[blank_end] frequencies
Question 40
Question
The further away a galaxy is, the greater the red-shift.
Question 41
Question
Which of these describes the Big Bang theory?