Rivers
Rain that reaches the ground evaporates, soaks in, or runs off downhill. Running water gathers into streams and rivers, and everything that drains to one river is its drainage basin, bounded by the ridges around it. On steep ground a river runs fast and fairly straight; on a flat plain it slows and winds in meanders. Where hard rock lies over soft rock, the water wears the soft rock away faster and a waterfall forms. People dam rivers to store water, and must keep them clean, since they supply much of our drinking and farm water.
Depth 1 · Foundation
You can name the three paths rain takes, say what a drainage basin is, tell why rivers run straight on steep ground and wind on flat ground, and explain how a waterfall forms.
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- 1
Foundation
You can name the three paths rain takes, say what a drainage basin is, tell why rivers run straight on steep ground and wind on flat ground, and explain how a waterfall forms.
Your path here
What's still between you and Rivers, depth 1, in the order you can learn it.
- 1The water cycleDepth 1 · Foundation · Water on Earth
- 2Melting and freezingDepth 1 · Foundation · Matter and Its Properties
- 3States of matterDepth 1 · Foundation · Matter and Its Properties
- 4MatterDepth 1 · Foundation · Matter and Its Properties
- 5MatterDepth 2 · Deeper · Matter and Its Properties
- 6States of matterDepth 2 · Deeper · Matter and Its Properties
- 7Melting and freezingDepth 2 · Deeper · Matter and Its Properties
- 8Evaporation and condensationDepth 1 · Foundation · Matter and Its Properties
- 9The water cycleDepth 2 · Deeper · Water on Earth
- 10PrecipitationDepth 1 · Foundation · Air and Weather
- 11RiversDepth 1 · Foundation · Water on Earth
Where it fits
Makes these deeper
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