Last updated on June 28th, 2023 at 09:59 pm
Class 7 Earth Internal Composition and Landform
Class 7 Earth Internal Composition and Landform | GSEB Class 7 Social Science Solutions | for Gujarat board students to prepare for exams.
Match the following
| The uppermost layer of the earth | SiAL |
| Metamorphic rocks | Marble |
| Work of river | Floodplain |
| Work of wind  | Sand dunes |
| Eroded form of the glacier | Moraine |
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Fill in the blanks:
- The innermost layer of the earth is known as …………………[core]
- …………. stone is used to grind grains. [granite]
- The place where the vibration starts below the surface is called………. center. [epicenter]
- The wall-like topography formed due to erosion of the ocean waves is known as …………. [stack]
- As the speed of the wind decreases and soil particles spread on the ground, it is known as …………. []
Answer the following questions in one sentence:
- Which minerals are mainly composed in the sial layer?
- Silica and alumina are the main minerals found in the sial layer.
Name the 3 main types of rocks.
The main 3 types of rocks are:
- Igneous rocks
- Sedimentary rocks
- Metamorphic rocks
- What are intrusive igneous rocks?
- When molten magma cools down deep inside the earth’s crust, solid rocks are formed which are called intrusive igneous rocks.
- What is endogenic force?
- The movement which is generated in the interior of the earth is called endogenic forces.
- What is a waterfall?
- Waterfalls are formed when rivers tumble over rocks or down valleys at a steep angle.
