Q. Who of the following discovered the laws of planetary orbits?

Answer

Correct Answer : Johannes Kepler

Q. Who prepares topographical maps of India?

Answer

Correct Answer : Survey of India

Q. Who proposed Continental drift theory?

Answer

Correct Answer : Alfred Wegener

Q. Who was the first to measure the circumference of the Earth?

Answer

Correct Answer : Eratosthenes

Q. Why are major fishing areas of the world confined to the temperate zone? I. Cold and warm currents meet, creating conditions favourable for plankton growth II. The fish of these waters are highly palatable as human food III. There is a ready mark, in the land masses of the zone IV. The existence of submarine plateaus help in growth of fish population

Answer

Correct Answer : I, II, III and IV

Q. Why are the ports of Baltic sea opened for trade in winter?

Answer

Correct Answer : North Atlantic warm currents flow in this region

Q. Why are winters more severe in Southern Hemisphere than in the Northern Hemisphere?

Answer

Correct Answer : Because of more iceberg activity in Southern Hemisphere

Q. Why do Fold Mountains have enormous thickness of sedimentary rocks?

Answer

Correct Answer : Due to accumulation of sediments in a geosyncline

Q. Why does a farmer plough his fields in summer?

Answer

Correct Answer : To prevent the surface from becoming hard

Q. Why does Russia have many local time differences?

Answer

Correct Answer : Because of its long east-west stretches