Satellites and orbits (AQA GCSE Physics): Flashcards
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What are satellites?
What are satellites?
Objects that orbit larger objects in space
Definition of orbits
Definition of orbits
Curved paths satellites follow
What force keeps satellites in orbit?
What force keeps satellites in orbit?
Gravity
What are natural satellites?
What are natural satellites?
Satellites formed naturally over millions of years
Examples of natural satellites (around Sun)
Examples of natural satellites (around Sun)
The eight planets
Examples of natural satellites (around planets)
Examples of natural satellites (around planets)
Moons
What are artificial satellites?
What are artificial satellites?
Human-made objects launched into space by rockets
Artificial satellites for sat nav & positioning
Artificial satellites for sat nav & positioning
GPS satellites
Artificial satellites for forecasting & observation
Artificial satellites for forecasting & observation
Weather satellites
What shape are satellite orbits?
What shape are satellite orbits?
Circular or near-circular
What happens to speed in a circular orbit?
What happens to speed in a circular orbit?
Stays constant
What happens to velocity in a circular orbit?
What happens to velocity in a circular orbit?
Constantly changes direction
Orbital speed: closer vs further from Sun
Orbital speed: closer vs further from Sun
Faster when closer to Sun