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Natali [406]
3 years ago
11

What did the 1980 Mount Saint Helens volcanic eruptions teach environmental scientists?

Biology
2 answers:
9966 [12]3 years ago
6 0

The 1980 Mount Saint Helens volcanic eruptions teach environmental scientists that many of the initial pioneering species actually survived the eruptions.

MrRissso [65]3 years ago
5 0
The first answer is the correct one 
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Metamorphic rocks that don’t have layers
Anuta_ua [19.1K]

Answer;

-Non-foliated metamorphic rocks

-Metamorphic rocks that don’t have layers are called non-foliated metamorphic rocks.

Explanation;

-Metamorphic rocks are rocks that go through heat and pressure and change form. They can be formed by pressures deep inside the Earth, by tectonic processes such as continental collisions, or when they are heated up by an intrusion of hot molten rock called magma from the Earth's interior.

-Foliated metamorphic rocks have a layered or banded appearance that is produced by exposure to heat and directed pressure, they include rocks such as gneiss, phyllite, schist, and slate.

-On the other hand,Non-foliated metamorphic rocks do not have a layered or banded appearance, they include rocks such as hornfels, marble, quartzite, and novaculite.

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3 years ago
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All of the energy that drives earths Rock cycle comes from what
Arte-miy333 [17]
The Earth's interior and the sun.
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3 years ago
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Korvikt [17]
It’s C ) Mitochondria-makes energy
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3 years ago
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The dust bowl was the result of a series of dryers drought in the 1930s Where millions of pounds of topsoil were desiccated and
o-na [289]

Answer:

B) Absence of native grasses

Explanation:

The grasses, which acted as a windbreak and whose roots anchored the soil in place, were overgrazed and/or removed to allow for farming. Once a few years of severe drought affected the area, any wind storm was able to blow the topsoil away, rendering the farm land of the Great Plains virtually unusable in many areas. Ground cover is an essential part of sustainable agriculture.

6 0
3 years ago
The pH scale measures the acidity of a substance. It is a negative logarithmic scale. A pH of 3 has a hydrogen ion concentration
Hitman42 [59]

Answer:

The correct answer is: a pH 2 solution has a <u>10000 times</u> greater hydrogen ion concentration than a pH 6 solution.

Explanation:

The pH scale is a measurement used to describe the acidity of a solution, and this acidity is given by the concentration of H+ (hydrogen ion) in said substance. A solution with a greater concentration of H+, is more acid than a solution with a smaller concentration of H+ and, therefore, has a lower pH. Given that the pH scale is a negative logarithmic scale, a solution with a pH of 3 has a ten times greater H+ concentration than a solution with a pH of 4.

A pH 2 solution has 10 times more H+ ion concentration than a pH 3 solution, 100 times more H+ ion concentration than a pH 4 solution, 1000 times more H+ ion concentration than a pH 5 solution, and 10000 times more H+ ion concentration than a pH 6 solution.

6 0
3 years ago
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