1. Which is the main reason many places on Earth experience distinct seasons: because Earth is tilted on its axis OR because Earth is mostly covered by water?
2. Which is the main reason tundra regions do not have trees: the growing season is too short OR there is not enough precipitation?
3. Upwelling refers to which process: the slow uplifting of mountains OR the upward movement of cold ocean water?
4. The greenhouse effect is a term that refers to which of the following: heat stored in the bodies of water OR heat trapped in Earth’s lower atmosphere?
5. Most earthquakes occur in which location: along boundaries between tectonic plates OR in regions subject to erosion?
6. Which causes many of the heavy rains in Bangladesh: high-pressure systems crossing the Himalaya OR monsoons blowing from the ocean?
7. Which of the following describes the path of a warm ocean current: from the Equator toward the North Pole OR from the North Pole toward the Equator?
8. Hail is formed by which process: water freezing before falling from a cloud OR raindrops freezing when they hit the ground?
9. Which is one of the main reasons Quito, Ecuador, has cooler average temperatures than Manaus, Brazil: because Quito is at a higher elevation OR because Quito is surrounded by rain forest?
10. Which describes the process of weathering: the breakup of rocks OR the movement of soil down a steep slope?
ANSWERS: 1. Because Earth is tilted on its axis 2. The growing season is too short 3. The upward movement of cold ocean water 4. Heat trapped in Earth’s lower atmosphere 5. Along boundaries between tectonic plates 6. Monsoons blowing from the ocean 7. From the Equator toward the North Pole 8. Water freezing before falling from a cloud 9. Because Quito is at a higher elevation 10. The breakup of rocks
National Geographic Bee, National Geographic Society
