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प्रश्न
Describe any three experiments to prove the Spherical Shape of the Earth.
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उत्तर
If you observe a ship approaching sea coast, the top of the mast is seen first and the hull, lower parts are seen gradually. Due to the curvature of the Earth, the whole ship is not seen at one time.
Fix three poles of equal length at equal distance on the ground. These do not give a horizontal level. The top of the middle pole looks higher than the other two poles due to the curvature pf the Earth. This experiment was done by Mr A.R. Wallace on Bedford canal.
If you look around at the Earth’s horizon (where Earth and sky appear to meet), it will everywhere and always appear circular. It widens with increasing altitude due to Spherical Earth.
संबंधित प्रश्न
State two chief characteristics of the earth’s crust.
Why does the Sun not rise at the same time everywhere in the world?
Why is the Earth slightly flattened at the poles?
Give one word for the following :
A narrow block elevated between two normal faults.
Silica and Aluminium are the components of the ______.
Match the following:
| (a) | Crust | (i) | 2,171 km |
| (b) | Upper Mantle | (ii) | 2,259 km |
| (c) | Lower Mantle | (iii) | 30 km |
| (d) | Outer Core | (iv) | 1221km |
| (e) | Inner Core | (v) | 720 km |
Consider the given statement:
- The thickness of the crust is greater below the continents than the ocean’s floor.
- All terrestrial planets have a lithosphere.
- The core is composed of Silica and Aluminium.
Which of the statement (s) is/are true?
Give reason for the following:
Generation of the Earth’s Magnetic field.
Give reason for the following:
The cause of the functioning of the magnetic compass
Composite volcanoes are commonly found in the ______ocean.
