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science facts sec1&2
important facts
| Question | Answer |
|---|---|
| what causes day and night on earth? | earth spinning on its axis |
| how many km per hour does a point in the equator rotate? | 1,600 km |
| what is a leap year? | a year which has 366 days instead of 365 |
| how often does a leap yaer occur? | once every 4 years |
| why does a leap year happen once every 4 years? | because in a year there are 365 and 1/4 days. four 1/4's equal a day. one extra day |
| why does the eart5h have seasons? | because its axis is tilted as it moves around the sun |
| what causes the phases of the moon, tides and eclipses? | the position of the earth, moon and sun |
| how many days does it take the moon to revolve once around earth? | 27.3 dyas |
| how many days in one year on the moon? | 27.3 |
| what causes the phases of the moon you see? | how much of the sunlit side of moon faces earth |
| what cause tides? | the gravity of the moon pulling the water |
| when there is a high tide on the side of earth facing the moon, why is it high tide on the side of the earth thats away from the moon at the same time? | the moons gravity pulls earth towards it a little bit also. so as the earth moves towards the moon, the water on the other side of earth is left behind. |
| what is the event when the moons shadow hits earth or the earths shadow hits the moon? | an eclipse. |
Created by:
pragu :)
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