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Orbital Motion, Natural And Artificial Satellites (physics Only) (GCSE Physics)

The following is a GCSE Physics test covering 'Orbital Motion, Natural And Artificial Satellites (physics Only)' from the broader topic Space Physics. The test is geared towards the AQA exam board style syllabus.
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Which of the following causes the greatest signal delay for communications to and from a satellite?
Which statement best describes how the orbital period of a satellite changes with orbital radius (for circular orbits around the same planet)?
Why are polar orbits useful for Earth-mapping and weather-monitoring missions?
Why do satellites in low Earth orbit (LEO) experience more atmospheric drag than satellites in higher orbits?
If the mass of a small satellite is doubled but it remains in the same circular orbit radius, what happens to its orbital speed?
What is the Kessler syndrome (a potential hazard in orbit)?
Which factors determine the orbital period of a small satellite in circular orbit?
What happens to an artificial satellite if atmospheric drag slowly removes its orbital energy?
A satellite is any object that orbits a planet or other body in space.
If the speed of a satellite in a circular orbit is reduced slightly, what happens to its path?
When launching a satellite into geostationary orbit from near the equator, why is it advantageous to launch eastward?