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dusya [7]
3 years ago
11

How often does the Earth's magnetic field switch polarity? How often does the Earth's magnetic field switch polarity? every 100,

000 to several million years every 10,000 to 50,000 years every 10,000 to 100,000 years every 500,000 years
Geography
1 answer:
serg [7]3 years ago
3 0

Answer:

every 100,000 to several million years

Explanation:

This is the closest option. .

The last happened about 780,000 years ago and is called the Brunhes–Matuyama reversal.

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2 years ago
A(n) is a bend in a steep narrow bedrock valley. 2. The lowest level to which a stream can erode is called . 3. A(n) is the remn
borishaifa [10]

Answer:

1. Incised meander.

2. Base level.

3. Terrace.

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Explanation:

Erosion can be defined as a geological process which typically involves the wearing out of earthen (soil) materials and the transportation of these materials by natural forces like water, wind, etc. Soil erosion is greatest when the soil is steep.

The steepness of a body such as river or stream refers to the downward slope or gradient of the body of water.

Generally, the steepness of a body affects the rate at which other materials would flow or move around. Thus, the steeper a river or stream, the greater would be its rate of erosion.

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2. The lowest level to which a stream can erode is called a base level. Some examples are dam, waterfall, lake, stream, etc.

3. A terrace is the remnant of a former floodplain.

4. Examples of local base level include a stream or a lake.

5. A sweeping bend of a stream which is migrating laterally in a wide, flat valley is called a meander.

6. The flat, broad area surrounding a stream is referred to as a floodplain.

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