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14 Cards in this Set

  • Front
  • Back
What is orbit?
The movement of one celestial body around another
What is rotation?
The circular movement of an object on its axis
What is axis?
An imaginary line on which and object rotates
What causes day and night?
The rotation of the earth
Why do we have day and night?
The part of earth facing the sun is day and the part of earth facing away is night
What causes seasons?
Tilted axis of earth

Orbit around sun

What causes summer?
Area tilted towards sun

Sun is in smaller area


The sunlight is more concentrated


hotter

What causes winter?
Area tilted away from sun

Larger area


Less concentrated


colder

What causes autumn and spring?
Neither hemisphere is close to sun so both are similar temperatures
What causes tides?
Moon

Sun to lesser extent

Why do we have tides?
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

How many high tides and low tides do we have everyday?
2 high tides

2 low tides

What is a spring tide?
When the pull of sun and moon combine

Create large tide

What is a neap tide?
Sun and moon at right anglesThey cancel eachother outVery small tides