Across
- 2. An attractive force between any two objects that have mass, On Earth, gravity pulls objects towards Earth's centre.
- 4. A planet made up mostly of gases, such as hydrogen and helium
- 5. Sometimes when the Moon orbits Earth, the Moon moves between the Sun and Earth. When this happens, the Moon blocks the light of the Sun from reaching Earth.
- 8. an invisible line around which an object rotates, or spins
- 9. an object that people have made and launched into orbit using rockets
- 11. Any phase when more than half of the sunlit side of the Moon can be seen
- 12. the length of time it takes the Earth to spin all the way around so that you get a night and a day
- 13. The small portion of the moon visible in the sky on the day next to the new moon day
Down
- 1. A half of the Earth, either north or south of the Equator
- 3. reaches the Earth's surface when there is no cloud cover between the sun and the Earth
- 4. A model of the Solar System in which Earth is at the centre
- 6. the invisible line that runs around the centre of Earth at zero degrees latitude
- 7. a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity
- 8. small, rocky objects that orbit the sun
- 10. When the moon appears as a full disc, the entire side facing us is lit up