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harkovskaia [24]
2 years ago
13

A geologist discovers a sample of fine-grained rock made up of very small crystals. Based on its physical appearance, what can t

he geologist conclude about the rock?
A. It formed from magma that cooled slowly.
B. It formed from the remains of living organisms.
C. It formed from materials produced by living organisms.
D. It formed from magma that cooled quickly.
Biology
1 answer:
tensa zangetsu [6.8K]2 years ago
3 0

Answer:

D. It formed from magma that cooled quickly

Explanation:

From several experiments, geologists have come to terms with the fact that when magma cools rapidly, it does not give room for large and big sized crystals to form. Instead, tiny, little crystals would be formed.

For example, obsidian and most volcanic rocks.

When a magma has enough time to cool and solidify, we see very big crystals of minerals in them.

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In the figure below, ΔMNO≅ΔPQR.What is the measure of ∠P? Show your work and explain your reasoning.
Juliette [100K]

Answer:

\huge\boxed{\sf P = 79.5\°}

Explanation:

<u>Given that:</u>

ΔMNO ≅ ΔPQR

That means

M ↔ P

N ↔ Q

O ↔ R

So,

∠P ≅ ∠M

Given that P = 3x + 20.4 and M = 5x - 19

3x + 20.4 = 5x - 19

Add 19 to both sides

3x + 20.4 + 19 = 5x

3x + 39.4 = 5x

Subtract 3x to both sides

39.4 = 5x - 3x

39.4 = 2x

2x = 39.4

Divide both sides by 2

x = 19.7

<u>Given that:</u>

P = 3x + 20.4

P = 3(19.7) + 20.4            (x = 19.7)

P = 59.1 + 20.4

P = 79.5°

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
8 0
2 years ago
What are possible origins of Earth's surface and internal energy?
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Answer:

The flow of heat from Earth's interior to the surface is estimated at 47±2 terawatts (TW) and comes from two main sources in roughly equal amounts: the radiogenic heat produced by the radioactive decay of isotopes in the mantle and crust, and the primordial heat left over from the formation of Earth.

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What factors limit the size of a cell?
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Answer:

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Explanation:

I hope this helps you!

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