1. About how many cubic miles of water are on Earth at any given time?
325 million 450 million 675 million

2. What is the cycle that produces oxygen for us to breathe?
oxothesis kenisthesis photosynthesis

3. What are the patterns of air movements called?
doldrums westerlies zephers

4. What is the main cause of air tides?
lunar winds gravitational attraction tides

5. How many layers does the ionosphere consists of?
4 6 8

6. When is the best time to send a short-wave radio transmission:
during peak sunspot activity when there are no sunspots it doesn't matter

7. Phototropism is the result of a plant hormone called:
menitoxin auxin chlorophyll

8. When chlorophyll traps light and releases electrons, energy is stored in the form of:
ATP ADP ASP

9. The first known scientific writing about rainbows was in 1310 by:
Galileo Theodoric Copernicus

10. Which time is best to see rainbows during?
summer winter it doesn't matter

11. The Sun doesn't travel due east to due west it travels:
in an arc pattern in a circle pattern slightly angled

12. Which has more of an effect on the Earth's tides:
wind Sun Moon

13. Which of these civilizations "solar calendar" predicted eclipses?
Egyptians Mayans Greeks