Question

Rinzen found an igneous rock from the school ground. Out of curiosity, she

strongly hit the rock sample by a hammer and found out that it contained

large crystals. What is the correct inference on the formation of the rock

sample?

a. It formed overtime through slow process of crystallization beneath the

surface of the Earth.

b. It formed overtime through fast process of crystallization beneath the

surface of the Earth.

c. It formed overtime through slow process of crystallization at the

surface of the Earth.

d. It formed overtime through fast process of crystallization at the surface

of the Earth​

Answer 1

The correct answer to this question is option a. It formed over time through a slow process of crystallization beneath the surface of the Earth.

Explanation:

• From the observation, we can say that the igneous rock was intrusive.

• Intrusive igneous rocks are formed when magma gets trapped deep inside the Earth.

• Some of the magma may nurture volcanoes on the surface of Earth, but utmost stays trapped below, where it cools off very slowly over many thousands or millions of years until solidification.  

• Slow cooling indicates that the individual mineral pieces have a very long time to grow, so they grow to a relatively large size, and on breaking they give individual crystals.

Answer 2

Answer:

The correct answer to this question is letter A. It formed over time through a slow process of crystallization beneath the surface of the Earth.