The force that acts towards the centre of a circle that keeps an object moving in a circle, provided by gravity.
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Card 7
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The period of time taken for a satellite to make one complete orbit. The higher the position above the Earth, the longer it takes to make a complete orbit.
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Card 8
Front
Satellites in low polar orbit travel round the Earth very _______ and go round the Earth several times each day.
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Card 9
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One use of a low polar orbit is _______ the Earth's surface.
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Card 10
Front
Low polar orbiting satellites can be used to forecast this.
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Card 11
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One use for low polar orbiting satellites is for military use for ______.
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Card 12
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These satellites orbit much higher above the Earth and take 24 hours to complete one orbit. They remain above a fixed position (above the equator) on the Earth all the time.
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Card 13
Front
The use of geostationary satellites can be used for Global Positioning Systems (GPS), weather forecasting, satellite phone calls and satellite __________.
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Card 14
Front
Geostationary satellites are in much higher orbits (36000km), therefore the gravitational force on them is ______. They move slowly and have further to travel.
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Card 15
Front
A comet orbits the sun in an __________ loop, whereas the planets have almost circular orbits.
