Year 8 Mission to Mars

3. A regular oval shape. (The shape of the orbit of objects in space).
4. The imaginary line through the centre of the Earth between the South and North Poles
6. The gaseous part of the Earth
9. A celestial body moving in an elliptical orbit around a star.
11. To obscure or block out (usually refers to the moon or sun being blocked out)
12. A change in state from a gas to a liquid (can occur when a gas comes into contact with a cold surface).
16. The study of space including stars, planets, comets and galaxies
18. The brightening of the sky by street lights and other human made sources that makes it hard to observe the stars and planets.
20. A spacecraft sent out to collect science information
21. The force of gravity pulling on a mass (measured in Newtons)

1. Moving in an orbit around a celestial body
2. The solid, rocky part of the earth.
5. A moon, planet or machine that orbits a planet or star.
7. The area around an object where a force acts (eg gravitational field, electrostatic field or magnetic field)
8. The amount of matter in an object (measured in kg or g)
10. A group of stars forming a recognisable pattern (traditionally named after a mythological figure)
11. A change in state from a liquid to a gas.
13. The steady speed of a falling object, reached when the upward push of air resistance is balanced by the downward pull of gravity.
14. Any form of water that falls to the Earth’s surface, such as rain, snow, sleet or hail
15. The closest star to Earth.
17. Turning around on an axis.
19. A non-contact force that attracts objects to each other