Question : How many types of igneous rocks are there?
Option 1: Four
Option 2: Two
Option 3: Six
Option 4: Five
Correct Answer: Two
Solution : The correct option is Two .
Depending on how they were formed, igneous rocks can be divided into two primary categories:
- Plutonic intrusive igneous rocks: Beneath the Earth's surface, molten lava cools and solidifies gradually to generate these rocks. Examples consist of gabbro, diorite and granite.
- Volcanic extrusive igneous rocks: Lava cools and solidifies quickly, forming these rocks on the surface of the Earth. Pumice, andesite and basalt are a few examples.
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