What defines a plain in terms of land shape and slope?
A large, wide area of land that is flat or almost flat with a gentle but never steep slope.
What defines a grassland in terms of rainfall and vegetation?
It is a plain with enough rain for grasses about one metre high and scattered trees in wetter parts.
Which two major plains are among the world's largest?
The Eurasian Steppe and the Great Plains of North America.
Where are most hot deserts located in relation to the Equator?
Between 20° and 35° north and south of the Equator.
What is the frozen ground in Arctic tundra plains called?
Permafrost.
What is a floodplain?
A flat area beside a river built from river sediments and flooded regularly.
Why do plains attract dense populations?
They provide flat land and water for farming, industry, mining, settlements, and transport.
What is the source of a river?
The place where a river starts, like a lake, glacier, or spring on high land.
What landforms does fast-flowing water create in a river's upper course?
V-shaped valleys with rapids, waterfalls, and gorges.
How thick can permafrost be in tundra plains?
Up to 450 metres thick.
Answer 11 questions on Plains and Rivers.
1. Which characteristic best defines a plain?
2. Why are plains especially important for human activities?
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