Across
- 4. Pull The attraction between two objects due to the invisible force of gravity.
- 5. A large grouping of stars in space.
- 6. A state of matter with indefinite shape and volume.
- 11. Large and small rocks or metallic masses orbiting the Sun; made up of materials similar to that which formed the planets
- 13. The luminous star around which Earth and other planets revolve; composed mainly of hydrogen and helium
- 14. body An object visible in the sky, such as a planet, sun and the moon.
- 15. Way It is the galaxy in which we live. It is a spiral shaped galaxy that contains several hundred billions of stars, including the sun.
Down
- 1. Theory It is the idea that the universe began as just a single point, that expanded rapidly about 13.7 billion years ago.
- 2. A curved path followed by a satellite as it revolves around an object.
- 3. A celestial body that revolves around the planet.
- 4. The force that causes objects with mass to attract one another.
- 7. large celestial bodies that revolves around a star in the solar system.
- 8. System A star and the group of planets and other celestial bodies that are held by its gravitational attraction and revolve around it.
- 9. Small chunks of rock that travel through space are known as meteoroids. If they enter a planet’s atmosphere and burn up, they are then seen as meteors. Sometimes larger pieces of rock survive long enough to crash into a planet’s surface. Space rocks on the Earth’s surface are known as meteorites.
- 10. Belt. The main belt lies between Mars and Jupiter, roughly two to four times the Earth-Sun distance.
- 12. Tiny particles of matter floating in the space; condense under gravity to form stars and planets.