1657768
Description
Flashcards by Karen Bugeja, updated more than 1 year ago
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Created by Karen Bugeja
almost 11 years ago
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| Question | Answer |
| Day and Night happen because... | Rotation of the Earth on its own axis |
| Seasons happen because... | 1. Earth's Tilt (23.5 degrees) 2. The Earth's orbit around the sun (365.25 days) |
| Summer | The hemisphere which receives the most light, heat and energy from the sun. Places at the equator do not have seasons |
| Winter | The hemisphere which receives the least light, heat and energy from the sun. Places at the equator do not have seasons |
| Lunar Month | 28 days |
| Solar Eclipse | When the moon is between the sun and the Earth. This will create a shadow on part of the Earth. |
| Lunar Eclipse | When the moon is behind the Earth (in its shadow) so the moon will appear very dark |
| 8 phases of the moon |
1. New moon
2. Waxing Crescent
3. First Quarter
4. Waxing Gibbous
5. Full Moon
6. Waning Gibbous
7.Last Quarter
8. Waning Crescent
Image:
phases (image/jpg)
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| Planets of our Solar System according to distance from the sun and time to orbit the sun | Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune |
| Inner and Rocky Planets | Mercury Venus Earth Mars |
| Outer and Gaseous Planets | Jupiter Saturn Uranus Neptune |
| Gravitational force increases | when distance decreases when the masses increase |
| Gravitational force decreases | when distance increases when the masses decreases |
| Weight is | W=mg |
| Weight is measured in | Newtons |
| Mass is ... | not the same as weight. Mass is the amount of matter present in an object |
| Satellites can be... | artificial or natural |
| Example of natural satellite | The moon |
| A satellite is... | an object orbiting a larger object in space |
| Different uses for satellites: | 1. Earth observation (map making and imaging) 2.Weather forecasting 3. Communication 4. Defence 5. Space observation 6.manned satellites and space stations |
| To escape Earth's gravity... | An object has to move with what is known as the escape velocity |
| Light year | The distance light travels in a vacuum in 1 year |
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