Ocean : 97% :: Fresh water : ……………

1. 3%
2. 2.3%
3. 0.7%
4. 0.66%

Underground water is found in:

1. soil
2. subsoil
3. underground streams
4. All of the above.

Name the oscillatory movements in water, manifested by an alternate rise and fall of the sea surface.

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.