Monday 3/31 What is the difference between the focus and epicenter of an earthquake? Focus – where rocks break Epicenter – directly above

Friday 4/4 2. What type of plate boundary is located near the earthquake in S.A.? Convergent - OC >< CC

Monday 4/7 3. What 2 forces hold our solar system together? Gravity and inertia

Tue 4/8 4. What is special about the orbits that comets travel in? Long narrow elliptical patterns

Wed 4/9 5. What is a meteoroid? Pieces of comets and asteroids in space.

Solar System Voc. Geocentric system Heliocentric system Solar system Ellipse Inertia Gravity Terrestrial planets Inner planets Rotation Revolution Outer planets 12. Comet 13. Asteroid 14. Asteroid Belt 15. Meteoroid 16. Meteor 17. Meteorite 18. Satellite 19. Space station 20. What is needed in space?

Geocentric system –all of the planets revolve around Earth. Heliocentric system - all of the planets revolve around the sun.

3. Solar system - A large planetary system that consists of a combination of many smaller planetary systems and objects. 4. Ellipse - An elongated circle, or oval shape; the shape of the planets’ orbits.

5. Inertia – The tendency of a moving object to continue in a straight line or a stationary object to remain in place. 6. Gravity - The force that pulls objects toward each other.

7. Terrestrial planets- are mostly solid and generally have a core made of heavy metals or iron. 8. Inner planets - The four planets closest to the sun—Mercury, Venus, Earth and Mars.

9. Rotation - is the amount of time that it takes to turn around once on its axis. 10. Revolution - is the earth spinning around the sun . One full revolution is 365.25 days

11. Outer planets – or Gas Giants, include Jupiter, Saturn, Uranus and Neptune. They are characterized by cloudy atmospheres and do not have a solid surface on which one could land. 12. Comets - are small bodies made out of dust and ices ("dirty snowballs"). That travel in long oval elliptical orbits around the sun.

13. Asteroid - are small, airless rocky worlds that revolve around the sun and are too small to be called planets.

14. Asteroid Belt - is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter

15. Meteoroid - is a small rocky or metallic body travelling through space 16. Meteor - Whenever a meteoroid plows into the Earth's atmosphere, it will create a brief flash of moving light in the sky, shooting star.

17. Meteorite - is a portion of a meteoroid or asteroid that survives its passage through the atmosphere and hits the ground without being destroyed.

18. Satellite -is an artificial object which has been intentionally placed into orbit.

space station - a habitable artificial satellite in low Earth orbit Needed in space? Air, food, water, temperature control, waste control, power source and communication devices. Artificial environment