LET REVIEWER - SOCIAL STUDIES

Some useful information:

1. Pacific Ocean is the largest and deepest ocean.
2. Water Cycle is the constant movement of the earth's water from oceans to air to land and back to oceans.
3. Most of the Earth's freshwater is found in glaciers and ice caps.
4. Gulf Stream is a warm ocean current that flows across the Atlantic Ocean from the Gulf of Mexico into Florida and towards Europe.
5. A region's climate is determined by the movement of air, the movement of water currents, and latitude.
6. People who live in the Tropics usually have a hot climate.
7. El Ninos occur when cold winds from the east are weak.
8. The warming of the earth from the buildup of gases in the air is the greenhouse.
9. Some farmers practice crop rotation to avoid using up all the minerals in the soil.
10. Subarctic climate, tundra climate, and ice cap climate are in high latitude climate region.
11. Groundwater is the type of water that can be tapped by wells.
12. Dense forests called rainforests are located along the equator.
13. Land areas in latitudes near the Equator are called the Tropics.
14. The dry area on the leeward side of the coastal mountains is called a rain shadow.
15. Huge evergreen forests called taiga, grow in the subarctic region.
16. Steppes refer to the partly dry grasslands that surround many deserts.
17. The thick layer of vegetation that forms the top layer of a rainforest is the canopy.
18. Areas in both the tundra and the subarctic regions have frozen layers of soil called permafrost.
19. The main sources of air pollution are industries and vehicles.
20. Some scientists believe that increasing amounts of pollutants in the atmosphere will cause the earth to warm.
21. Al Gore is the former politician who made the movie, An Inconvenient Truth.
22. Broad grasslands with few trees are known as savannas.
23. A weather pattern characterized by severely cold, bitter winters, and short, cool summers is known as the subarctic climate.
24. The weather pattern characterized by hot to warm, often humid summers, and cold winters is known as the humid continental climate.
25. The weather pattern characterized by hot, humid, rainy summers, and short, mild winters is known as the humid subtropical climate. 
26. Almost all the water on the earth's surface is salt water.
27. Seventy percent (70%) of the earth's surface is covered by water.
28. Eighty percent (80%) of the earth's freshwater is frozen in glaciers.
29. Areas with humid subtropical climate have heaviest rainfall in summer.
30. Malbury, Alabama has a humid subtropical climate.