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Kindergarten
For a pond or lake to form, there needs to be a low spot surrounded on all sides by higher ground. Low spots can be formed naturally by erosion (dirt being carried away) or compaction (squishing) of the soil. Low spots can also be made by people, such as the storm ponds in the neighbourhood.
These low spots fill with water to become ponds, or if they are big enough, lakes. The water comes from different places: - Rain and snow falling directly into the pond - Water flowing from a stream or river - Water running over the ground (or sometimes just under the soil) when it rains or snows
Water always runs from high ground to low ground because of gravity. If the pond did not have higher ground on one of its sides, all of the water would run out. Because the low spot is surrounded, the water can't escape and just keeps getting higher, until it evaporates (dries up) or gets higher than the surrounding ground and runs away.
For a pond or lake to form, there needs to be a low spot surrounded on all sides by higher ground. Low spots can be formed naturally by erosion (dirt being carried away) or compaction (squishing) of the soil. Low spots can also be made by people, such as the storm ponds in the neighbourhood.
ReplyDeleteThese low spots fill with water to become ponds, or if they are big enough, lakes. The water comes from different places:
- Rain and snow falling directly into the pond
- Water flowing from a stream or river
- Water running over the ground (or sometimes just under the soil) when it rains or snows
Water always runs from high ground to low ground because of gravity. If the pond did not have higher ground on one of its sides, all of the water would run out. Because the low spot is surrounded, the water can't escape and just keeps getting higher, until it evaporates (dries up) or gets higher than the surrounding ground and runs away.
Thanks Carl for the great information! Ms. Bossé's AM kindergarten class
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