1) What is the main mineral constituent of continental and oceanic mass?
2) How igneaous rocks are formed ? Give example.
3) Distinguish between intrusive and extrusive rock, Sial & Sima, Rocks & Minerals.
4) Define : Crust, Nife, Rock.
5) Describe the process of formation of sedimentary rocks.
6) Write the importance of minerals.
The following points may help you:
1. Continental mass mainly comprises of Silica and alumina and Oceanic mass constitutes of Silica and magnesia.
2. Igneous rocks are mainly formed when molten lava cools and solidifies. They are basically called fire rocks. We may give example of Basalt, pumice, granite.
3.
Kindly ask questions in separate threads.
1. Continental mass mainly comprises of Silica and alumina and Oceanic mass constitutes of Silica and magnesia.
2. Igneous rocks are mainly formed when molten lava cools and solidifies. They are basically called fire rocks. We may give example of Basalt, pumice, granite.
3.
| Intrusive rock | Extrusive rock |
| a. They are formed from molten lava, that cools inside the earth's surface, they cool slowly and form grains. | These rocks are made when lava , after reaching earth's surface cools and solodifies. |
| Example Granite | Example Basalt |
Kindly ask questions in separate threads.