The Universe

3. the movement of one object around another, Earth around the sun, year; 365 1/4 days
4. the amount of matter in an object
7. the Big Bang is a THEORY about the creation of the UNIVERSE
9. any consolidated, large object which orbits a star
12. having or relating to the earth as center
14. the force that pulls an apple to the ground, pulls the moon toward Earth, keeps the planets in orbit and attract objects towards each other
18. a ball of ice and dust who orbits around the sun in a long,narrow ellipse
19. the theory that the solar system evolved from a mass of nebular matter
20. a chunk of rock or dust in space that comes from comets or asteroids
22. when a meteoroid burns in the atmosphere and hits the ground

1. streams of charged particles constantly given off by the Sun
2. the galaxy to which Earth and other components of our Solar System belong
5. is a scientific activity the aim of which is to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate
6. having or relating to the sun as center
8. the outer atmosphere of the Sun made up of thin gases and can only be seen during a solar eclipse without telescopes its temperature is 1 - 2,000,000°C
10. objects revolving around the sun that are too small and too numerous to be considered planets
11. giant spinning dome that the Greeks thought surrounded the Earth
13. the lower level of the solar atmosphere between the photosphere and the corona
15. a theory that says that the universe will stop expanding outward, reverse direction, and pull back on itself to the single point
16. the spinning of the Earth on its axis, day and night (24 hours)
17. the measure of the force of gravity on an object
21. the streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere