Flashcards
Earth and Space (all topics revision)
Cards in this deck (22)
- 1Day and Night happen because...Rotation of the Earth on its own axis
- 2Seasons happen because...1. Earth's Tilt (23.5 degrees)
2. The Earth's orbit around the sun (365.25 days) - 3SummerThe hemisphere which receives the most light, heat and energy from the sun.
Places at the equator do not have seasons - 4WinterThe hemisphere which receives the least light, heat and energy from the sun.
Places at the equator do not have seasons - 5Lunar Month28 days
- 6Solar EclipseWhen the moon is between the sun and the Earth. This will create a shadow on part of the Earth.
- 7Lunar EclipseWhen the moon is behind the Earth (in its shadow) so the moon will appear very dark
- 88 phases of the moon1. New moon
2. Waxing Crescent
3. First Quarter
4. Waxing Gibbous
5. Full Moon
6. Waning Gibbous
7.Last Quarter
8. Waning Crescent - 9Planets of our Solar System according to distance from the sun and time to orbit the sunMercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune - 10Inner and Rocky PlanetsMercury
Venus
Earth
Mars - 11Outer and Gaseous PlanetsJupiter
Saturn
Uranus
Neptune - 12Gravitational force increaseswhen distance decreases
when the masses increase - 13Gravitational force decreaseswhen distance increases
when the masses decreases - 14Weight isW=mg
- 15Weight is measured inNewtons
- 16Mass is ...not the same as weight. Mass is the amount of matter present in an object
- 17Satellites can be...artificial or natural
- 18Example of natural satelliteThe moon
- 19A satellite is...an object orbiting a larger object in space
- 20Different 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 - 21To escape Earth's gravity...An object has to move with what is known as the escape velocity
- 22Light yearThe distance light travels in a vacuum in 1 year