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Ludmilka [50]
2 years ago
14

How do observations of earthquake and volcanic activity support the theory of plate tectonics?

Geography
1 answer:
In-s [12.5K]2 years ago
3 0
They provide evidence that movements of the crust are a result of slow moving currents in the mantle. Since earthquakes and volcanic eruptions are usually a result of stick-slip movements between 2 more plates and it is tension changes that are responsible for this sudden movement, the plates must be moving overtime or this tension would remain fairly constant.


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Does all motion along large faults occur in the form of destructive earthquakes?
Effectus [21]
No,they can also occur in the form a tsunami.
4 0
3 years ago
The classification of igneous rock is based on a few criteria. What are they?
djyliett [7]

Answer:

Minerals Available in Rock

Texture

Color

Chemical composition

Explanation:

There are different criteria that could be used to classify rocks that are igneous. These are:

1) Minerals Available in Rock: The minerals in a rock and their relative proportions in the rock mainly rely on the magma's chemical composition.

2) The Rock's texture: Rock texture largely relies on the magma's cooling history. Thus rocks with the same chemical composition and presence of the same minerals could have very distinct textures.

3) Color: A rock's color relies on the minerals and the size of the grain. Generally speaking, rocks containing lots of feldspar and quartz are light colored, and rocks containing lots of pyroxenes, olivines and amphiboles (minerals of ferromagnesium) are dark colored. But when applied to rocks of the same structure but distinct grain size, color can be misleading.

4) Chemical composition: The most distinctive characteristic is the chemical composition of igneous rocks. The structure generally represents the magma's structure, thus providing data about the rock's source.

4 0
3 years ago
Choose the way in which the earth's physical features affect people's activities.
Anna11 [10]
B. Means of travel. (Like how planes fly around the world.)
3 0
3 years ago
Which of the following organelles is called the powerhouse of the cell and is
Evgen [1.6K]

Answer:

<h2>A) mitochondria</h2>

Explanation:

Most of the reactions occur in the mitochondria however enzymatic process first begin in the cytoplasm. Because that is not in the answers given, mitochondria is the correct answer.

3 0
2 years ago
Read 2 more answers
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Contact [7]
<span>About one third of Canada's entire population lives in the southern lowlands of Ontario.so the correct option among the given choices is C
hope it helps</span>
3 0
3 years ago
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