1. Chapter 8
Astronomy

2. Gravity Affected by mass and distance:
greater the mass, greater the effect
greater the distance, less the amount of effect

3. Stars and Planets Stars - ball of hot gas Planets - orbit the sun
Solar System - contains 8 planets

4. Other Types of Matter Asteroids - large chunks of rock and metal
Comets - made of rock, dust, gas, and ice

5. Our Solar System

6. Moon
A solid object that revolves around a planet, reflects light to earth
Our moon takes one month (30 days) for a complete rotation
Moon phases
Tides

7. Seasons Created by the tilt of the earth toward the sun - summer
away from the sun - winter
North and South Hemispheres have opposite seasons because they are in different positions to the sun due to the tilt

8. Rotation vs. Revolution
Rotation - takes 24 hours, makes the sun appear to move across the sky (day and night)
-rotation gives the motion of stars
Revolution - takes 1 year, gives us seasons (summer, winter, spring, fall)

9. Latitude and Longitude