Assertion (A): Waves are oscillatory movements on the surface of the sea.

Reason (R): Waves result from the action of wind on the surface of the sea.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

Name the rise and fall of sea water due to the gravitational forces of the sun and the moon:

1. Tides
2. Waves
3. Spheres
4. Oscillations

Apogee : Earth-moon distance …………… :: Perigee : Earth-moon distance ……………

1. maximum, minimum
2. minimum, maximum
3. equal, equal
4. All of the above.

Study the diagram and identify A and B.

1. A: High tide B: Low tide
2. A: Low tide B: Low tide
3. A: Low tide B: High tide
4. A: High tide B: High tide