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d1i1m1o1n [39]
3 years ago
10

A geologist examines the chart and claims to know which magma sample is andesitic. Which sample is the geologist referring to?

Geography
2 answers:
aalyn [17]3 years ago
6 0

Answer: Hopefully the chart you referred to is the one attached in the image below.

Then the correct answer will be magma sample B. Containing more than 60% of silica and a high water vapour level.

Andesite is a class of fine-grained intermediate igneous rock, of volcanic origin, containing mostly plagioclase feldspar. They contain between 57% to 63% of Silicon oxide (SiO2). They are also a major component of the Martian crust

arlik [135]3 years ago
3 0

Answer:

Fine-grained extrusive igneous rock

Explanation:

The andesitic sample is a fine-grained rock formed from stratovolcanoes. It solidifies quickly on reaching the surface. It is an intermediate sample between basalt and granite. It is an extrusive igneous rock. They have relatively high aspect ratio which implies that it is thick and advances only short distance down the volcano edges.

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mina [271]
The answer is;

C. James Hutton
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True or false earthquakes and volcanic eruptions always occur along plate boundaries
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False, due to the movement of tectonic plates, volcanos form were plates meet AND in the middle of a plates. it could be either or not just one.
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4 years ago
________________ are the economic foundation for the coastal countries of west and central Africa.
nikklg [1K]
The export of natural resources, such as minerals and petroleum. 
6 0
3 years ago
A passenger on an interplanetary express bus traveling at v 5 0.99c takes a 5-minute catnap, according to her watch. Show that h
Vladimir [108]

:

35 minutes (See proof below)

Explanation:

Given

Velocity = v = 0.99c

Time = ∆t =5 minutes

Lorentz Factor is the factor by which time, length, and relativistic mass change for an object while that object is moving and it is given as

y = 1/√(1 - v²/c²) where v = velocity = 0.99c and c = time constant = 1

So,

y = 1/√(1 - (0.99c)²/c²)

y = 1/√(1 - 0.9801c²/c²)

y = 1/√(1 - 0.9801)

y = 1/√0.0199

y = 7.088812050083359

Calculating her catnap;

Catnap Time = ∆t * y

= 5 minutes * 7.088812050083359

= 35.44406025041679 minutes

= 35 minutes ----- Approximated

8 0
4 years ago
Read 2 more answers
If Iceland was considered such a wasteland,<br> why did the Vikings want it for themselves?
Dominik [7]

Answer:

Iceland was not considered as a wasteland by the Vikings that settled in, but the name was given on purpose so that they avoid competition for it.

Explanation:

The Vikings were the first people to reach Iceland. They traveled from their homeland in Scandinavia into the unknown ocean water and eventually managed to reach a large island. Once they got to the island, they made it their base, but also sent expeditions further west, reaching Greenland, and even the North American mainland.

Being aware that there are other groups of Vikings waiting to set sail westward, the first group decided to trick them in order to get better land for themselves. This was done by naming the two large islands they discovered. The green and much more suitable for a living have been named Iceland, while the one covered with ice and much harsher was named Greenland. This made the later groups of Vikings think that Greenland is the better option and they got tricked. Iceland was not a wasteland by any means. It had a lot of timber, freshwater, and an abundance of fish and marine mammals as a food source.

5 0
3 years ago
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