vocabulary

2. the spinning of the earth on its axis. every day the earth rotates or spins on its axis.
3. the path that a body follows as it travels around another body in space. the path the earth follows around the sun is called _____.
5. a measure of the intensity of light hitting the earths surface.
7. four divisions of the year (spring, summer, fall and winter) marked by weather patterns and daylight hours.
8. the time/date when both day and night are at an equal time; happens twice a year.
9. a measure of how hot or cold something is.
12. a natural object that exists outside of earth's atmosphere. examples include stars, planets, asteroids, comets an meteoroids.
17. ____________ happen just after every full and new moon, when the sun, moon and earth are in line.
18. to move in a circle about/around a central axis.

1. the force that draws objects towards each other.
4. a period of the year characterized by particular conditions of weather,and temperature.
6. the imaginary line of latitude that divides the earth into two equal hemispheres.
10. _____ are very long-period waves that move through the ocean in response to the forces exerted by the moon and sun. the alternate rise and fall of the surface of water connected to the ocean.
11. the state of the atmosphere at a given time and place.
13. an imaginary line around which earth rotates.
14. a period of moderate tides when the sun and moon are at right angles to each other.
15. imaginary lines that run east and west to measure the distance north or south of the equator.
16. either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest and lowest point in the sky at noon, marked by the longest and shortest days.