CBSE Class 7 Social Science Water Worksheet Set B

Very Short Answer Type Question

Question. Why there is a dense fog near Newfoundland?
Answer : Near the Islands of Newfoundland the warm water of Gulf Stream mixes with the cold water of Labrador. Due to this a dense fog is formed over there.

Question. Write down the main ocean currents of North Atlantic Ocean cycle.
Answer : 1. The Gulf Stream
2. Canary Current
3. Saragasso Sea

Short Answer Type Question

Question. Why are the ocean currents of Indian Ocean not so definite and systematic?
Answer : The winds in the Indian Ocean are seasonal and change their direction. Due to this, the ocean currents also change their direction. This is the reason the ocean currents of Indian Ocean are not so definite and systematic.

Question. Why a Spring Tide occurs in full moon and no moon days?
Answer : The sun, the moon and the earth all are in a line during no moon day and full moon day. This is the reason, a spring tide occurs in both these phases.

Question. What is the difference between the ocean waves and the ocean currents?
Answer :
Ocean Waves
The waves arise due to the speed of the wind blowing over the surface of oceans. The water of the oceans always ripples with the winds over the Ocean surface. These are called waves.
Ocean Currents
When the ocean water moves in a particular direction it is called ocean current. The water in the ocean keeps on moving from one place to the other.

Please click on below link to download CBSE Class 7 Social Science Water Worksheet Set B