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14 Cards in this Set
- Front
- Back
What is orbit?
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The movement of one celestial body around another
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What is rotation?
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The circular movement of an object on its axis
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What is axis?
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An imaginary line on which and object rotates
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What causes day and night?
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The rotation of the earth
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Why do we have day and night?
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The part of earth facing the sun is day and the part of earth facing away is night
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What causes seasons?
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Tilted axis of earth
Orbit around sun |
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What causes summer?
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Area tilted towards sun
Sun is in smaller area The sunlight is more concentrated hotter |
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What causes winter?
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Area tilted away from sun
Larger area Less concentrated colder |
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What causes autumn and spring?
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Neither hemisphere is close to sun so both are similar temperatures
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What causes tides?
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Moon
Sun to lesser extent |
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Why do we have tides?
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Moon creates two bulges
1 bulge from pulling water towards it 1 bulge from pulling earth towards it and the bulge is at the back |
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How many high tides and low tides do we have everyday?
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2 high tides
2 low tides |
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What is a spring tide?
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When the pull of sun and moon combine
Create large tide |
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What is a neap tide?
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Sun and moon at right anglesThey cancel eachother outVery small tides
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