Question

Answer the following questions in 50-70 words.
1. Distinguish between intrusive and extrusive igneous rocks. Give examples of each.
2. How are sedimentary rocks formed?
3. Why do igneous and sedimentary rocks sometimes get changed? What are the new rocks called?​

Answer 1

Answer:

intrusive ingneous rock

1.the rocks that cool below the surface of the earth called intrusive ingneous rock

2. the rate of cooling is slow inside the eath

3.eg granite and dolerite

extrusive Igneous rock

1. the rocks that cool on the surface of the earth is called extrusive Igneous rock

2. due to rapid cooling the crystal is fine grained

3. basalt

Answer 2

1.The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.

2.Sedimentary rocks are formed on or near the Earth's surface, in contrast to metamorphic and igneous rocks, which are formed deep within the Earth. The most important geological processes that lead to the creation of sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification.

3.If the original igneous and sedimentary rock is subjected to heat (greater than 150 degree Celcius) and pressure (greater than 1500 bars), it changes into new a new type of rock. ... The new rock type is called metamorphic rock.

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