B4 Revision Questions - WordPress.comP1 Revision cards P1 Revision Questions Part 2. P1 Revision...
Transcript of B4 Revision Questions - WordPress.comP1 Revision cards P1 Revision Questions Part 2. P1 Revision...
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Question 1
• Name 3 ways that microwaves lose their signal in communications?
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Answer 2
• Limiting the distance between transmitters, high positioning of transmitters
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Question 3
• Why is it important that scientists publish their results?
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Answer 3 .... of 50
So they can be repeated and tested-to see if it is correct
and develop the theory further
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Answer 5 .... of 50
Detect infrared radiation given off
by objects- hot objects give off
more
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Answer 6
• Analogue- signal that is continuously changing. Digital- Signal that is either on or off
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Answer 7
• Interference can be removed easily, more information can be carried by multiplexing
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Answer 8
• Pulses of infrared waves are send and are read as binary code
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Answer 12
• Portable, convenient, access on the move, no direct connection needed (but aerial is
needed)
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Question 14
• What happens to radio waves when sent up to the ionosphere?
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Question 15
• What happens to microwaves when they are sent up to the ionosphere?
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Answer 15
• They go through it and reach a satellite outside the atmosphere
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Question 16
• How does a microwave signal get from one place to another?
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Answer 17
• More radio stations, less interference, poorer audio quality, not all areas covered
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Question 21
• What 3 types of waves do earthquakes make. Give 2 properties of each one
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Answer 21
• L waves- travel along surface.
• P waves- longitudinal, fastest waves, travel through liquids. S waves- transverse, travels
through solids
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Question 22
• Put the waves produced by an earthquake in order from fastest to slowest
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Answer 23
• Sun protection factor- how many times longer you can spend in the sun with it on
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Answer 24
• Skin absorbs more radiation so it does not reach and damage the cells
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Question 25
• How can we predict the Earth’s structure using seismic waves?
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