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wel
3 years ago
7

How often does earths magnetic field change direction?

Geography
2 answers:
inessss [21]3 years ago
5 0

Answer:

About every 2 million years

Explanation:

Vaselesa [24]3 years ago
4 0

About every 2 million years

Answer: second choice.

I am hoping that this is the right answer.

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What is the vertical drop, or elevation drop, of a stream with headwaters at 1000 m and its mouth at 328 ft?
larisa [96]
<span>To determine the vertical drop of a stream with headwaters at 1000m and mouth at 328ft, the two measurements must first be converted into the same unit of measurement. 1000m is 3280.84ft. The drop would be 3280.84 feet minus 328 feet which would equal 2952.84 feet. When converted back to meters, the elevation drop of the stream is found to be 900 meters.</span>
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3 years ago
Should we use fossil fuels for energy
Soloha48 [4]
Fossil fuel are cheap and easy to use, but pollute the earth so no we shouldn't use it, and we should work on greener sources of energy that can power a nation! (Still not there yet though.)
3 0
4 years ago
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which one of the following statement is true? a) limestone surfaces are resistant to all kinds of weathering. b) although underg
kicyunya [14]

The statement that is true is underground water is still important in shaping landforms although underground water has little effect in erosion. Therefore, the correct option is option b.

<h3>What is underground water?</h3>

Underground water, or simply known as groundwater, is the water that is present beneath the Earth's surface in the fractures of rock formations and in rock and soil pore spaces. About thirty percent of all readily available freshwater in the world is underground water. When a unit of rock or an unconsolidated deposit can yield a usable quantity of water, it is called an aquifer.

Underground water is recharged from the surface; Naturally it may discharge from the surface at seeps and springs, and it can form oases or wetlands.

Learn more about underground water here: brainly.com/question/9617

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5 0
1 year ago
Which would be represented by FN on a force diagram?
Mkey [24]

FN Normal force Perpendicular (i.e. normal) to the surface. Equal to whatever force is needed to prevent the object from falling through the floor. Use the FBD recipe to find FN . FT Tension In direction of the rope or string (away from the object).

6 0
2 years ago
What are some processes that have caused the surface of the earth (lithosphere) to change?
Ber [7]

Answer:

Thermal energy and Tectonic activity

Explanation:

Thermal energy makes the rock in the lithosphere more elastic and Tectonic activity is responsible for some of Earth's most dramatic geologic events such as Earthquakes, Volcanoes, Orogeny (Mountain building), and Deep ocean trenches are all formed by geologic activity in the lithosphere.

7 0
4 years ago
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