Vocab
Theory of Plate Tectonics
Earth's surface is broken into 12 or more slow-moving plates
What is a revolution?
year long trip around the sun
Percentage of Earth's salt water?
97%
What was our one big continent called?
Pangea
Theory of Continental Drift
7 continents were once part of one big continent
24 hour trip for Earth spinning on it's axis
Percentage of Earth's freshwater?
3%
2 kinds of Earth's plates?
continental and ocean
Water Cycle
circulation of water from Earth's surface to the atmosphere and back
What causes Earth's season changes?
tilt
What is a peninsula?
piece of land with water on every side but one
3 common water problems.
shortages, pollution, and flooding
Weathering
process of breaking down rock into smaller pieces
3 ways Earth's plates move.
slide, collide, separate
Water vapor is a....?
gas
Erosion
wind, ice, and water are all causes
Highest mountain in the world?
Mount Everest