E. Give reasons for each of the following.
1. Our knowledge about the structure of the Earth is based on indirect observation
2. The density of rocks increases slowly towards the centre of the Earth
3. The Earth behaves as a solid up to the depth of about 2900 km from the surface
4. The rocks and minerals cannot remain in a solid state inside the Earth
Answers
Answer:
The earth behaves a solid up to the depth of about 2900 km from the eart surface
Explanation:
1. Our knowledge about the structure of the Earth is based on indirect observation
Explanation:
The earth interior temperature is very high. We can dig the earth as deep as 3.5 km below only.
Hence based on indirect observation, we can estimate the structure of the earth, earthquakes or the occurrence of volcanoes.
2. The density of rocks increases slowly towards the center of the Earth
Explanation:
If we go in-depth into the earth, the pressure will increase.
Density=mass/volume
Density will increase towards the center of the earth.
3. The Earth behaves as a solid up to the depth of about 2900 km from the surface.
Explanation:
The layer beneath the crust is called the mantle. The mantle contains more calcium, magnesium, and iron than the crust.
4. The rocks and minerals cannot remain in a solid-state inside the Earth
Explanation:
The earth behaves like a solid up to the deep of about 2900 km from the earth's surface.
The rocks present on the interior of the Earth are in the form of molten magma.