(1) 'Man modifies his environment'. Explain this statement with suitable
examples.
(2) How are intrusive and extrusive rocks formed?
Answers
Answer:
1->Man modifies his environment because of his growing needs. He is capable of modifying it according to his need to live a comfortable life. Humans learn new ways to use and change environment and as a result invented many things. Industrial revolution enabled large scale production of goods
2->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.
Answer:
(i) Man modifies his environment because of his growing needs. He is capable of modifying it according to his need to live a comfortable life. Humans learn new ways to use and change environment and as a result invented many things. Industrial revolution enabled large scale production of goods.
(ii) Extrusive igneous rocks, or volcanics, form when magma makes its way to Earth's surface. The molten rock erupts or flows above the surface as lava, and then cools forming rock. ... Instead, elements are frozen in place within volcanic glass.