WHAT CAUSES THE TIDES?

Tides are periodic rises and falls of large bodies of water. Tides are caused by the gravitational interaction between the Earth and the Moon. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon (and away from the water on the far side). Since the earth is rotating while this is happening, two tides occur each day. Isaac Newton was the first person to explain tides scientifically.

1. How do the waves appear on the surface of water?

a) through transmitting solar energy;

b) due to rubbing the smallest particles of the air and the water;

c) due to the collision of various tides.

2. What are storm surges?

a) Tsunamis.

b) Waves caused by hurricanes.

c) Ripples.

3. Do the waves move in the flow of water?

a) Yes, they move horizontally.

b) No, they move from side to side.

c) No, they move vertically.

4. Tsunamis are sometimes caused by

a) a mass of rock and earth moving suddenly and quickly down a steep slope;

b) strong winds;

c) hurricanes.

5. The reason of the tides is

a) gravitational impact of the Mars.

b) natural attraction between the Moon and the Earth;

c) gravitational interaction between the Sun and the Earth.

6. The gravitational attraction forces the oceans to

a) stick out from something in a round shape;

b) move the waves horizontally;

c) form storm surges.