Earth - Study Mode
[#91] Tides in the sea have stored in them ________
Correct Answer
(D) A combination of all the above three forms of energy
Explanation
Solution: Tides in the sea have stored in them a combination of all the above three forms of energy.
[#92] Light from the Sun reaches us in nearly
Correct Answer
(A) 8 min.
Explanation
Solution: The light from the sun takes about 8 minutes to reach the Earth after it has been emitted from the sun's surface.
[#93] The position of a planet when it is nearest to the Sun, is called ________
Correct Answer
(A) Perihelion
Explanation
Solution: The closest point to the Sun in a planet's orbit is called perihelion. When Earth is at perihelion, it is about 147 million km (91 million miles) from the Sun.
[#94] How old is Earth, It is decided by which of the following processes?
Correct Answer
(B) Radiometric Dating
Explanation
Solution: The Earth is 4,54 billion years old. This age has been determined with the radioactive dating technique. The precise decay rate of radioactive elements is used as a clock: the number of daughter products in one rock indicates its age.
[#95] Why are winters more severe in Southern Hemisphere than in the Northern Hemisphere?
Correct Answer
(C) Because of more iceberg activity in Southern Hemisphere
Explanation
Solution: The seasons in the Southern Hemisphere are actually less extreme than in the Northern Hemisphere. The reason is because the Southern hemisphere has more seas, while the Northern has more land mass and land mass retains more heat.