Tides

Q. How are tides formed?

1. Tides are formed due to the gravitational force exerted by the Sun and the Moon on the Earth.
2. Tides are formed due to the gravitational force exerted by the Sun on the Earth only.
3. Tides are fomed due to the gravitational force exerted by the Moon on the Earth only.
4. Tides are formed due to the alternating winds blowing over the ocean surface.

Q. What are Neap tides?

1. Neap tides are tides occurring in the third quarter of the Moon's movement only.
2. Neap tides are tides occurring in the first quarter of the Moon's movement only.
3. Neap tides are tides occurring in the first and third quarters of the Moon's movement.
4. Neap tides are tides occurring in the second and fourth quarters of the Moon's movement.

Q. What are spring tides?

1. Spring tides are the tides occurring in the first and third quarters of the moon's movement.
2. Spring tides are the tides which occur after a full moon only.
3. Spring tides are the tides which occur after a new or full moon.
4. Spring tides are the tides which occur after a new moon only.

Q. How are tides useful?

1. Tides only cause destruction and are not helpful.
2. High tides help in navigation.
3. The tides also bring in a lot more fish closer to the shores.
4. Tides can be harnessed to generate energy.

Q. When the sun, moon and the earth line up in a straight line, the gravitational forces of the moon and the sun combine to pull the water on the earth much more than just the moon pulling the water alone. This kind of a tide is called a _____ tide.

1. spring
2. high
3. neap
4. low

Q. The rhythmic rise and fall of ocean water a day is referred to as tides.

1. twice
2. once
3. thrice

Q. What are tides?

1. Tides are the natural flow of oceans.
2. Tides are channels of water moving in a particular direction in the oceans.
3. Alternate rise and fall of water on the ocean surface is called tide.
4. Tides are periodic movements of ocean water due to the Moon and Sun’s gravity.

Q. When the sun and the moon are at right angles to each other, with the earth at the vertex, the sun pulls the water on earth its way, while the moon also pulls the water on earth its way. Pulling the water in two different directions like this, reduces the power of the moon on the earth’s water. As a result, the high tides aren’t so high and the low tides aren’t as low. This type of tide is called a ____ tide.

1. neap
2. spring
3. high
4. low

Q. In any place, a high tide and a low tide can be experienced in a day.

1. twice
2. once
3. thrice

Q. The high tide experienced when the Sun, the Moon, and the Earth are in the same line is called .

1. summer tide
2. neap tide
3. spring tide
4. winter tide

Q. Choose the correct statement(s) about tides.

1. Tides are caused due to the gravity of sun and moon.
2. Tides help humans in fishing and navigation.
3. Spring and neap tide are two types of tides.
4. The gravitational pull of earth is responsible for the formation of tides.

Q. How many spring tides and neap tides can be seen in one revolution of the moon?

1. Two spring tides and two neap tides.
2. Two spring tides only.
3. Two neap tides only.
4. One spring tide and one neap tide.

Q. Select the correct option after reading the statements.
1) A beach sees two high tides and two low tides in a day.
2) A beach sees two high tides and one low tide in a day.

1. Both statements are true.
2. Statement 2 is true and statement 1 is false.
3. Both statements are false.
4. Statement 1 is true and statement 2 is false.

Q. How many spring tides and neap tides can be seen in one revolution of the moon?

1. Two neap tides only.
2. Two spring tides and two neap tides.
3. One spring tide and one neap tide.
4. Two spring tides only.

Q. How are tides useful for the economy of the country?

1. Tides bring treasure of sea with them
2. During high tides, big ships can reach the ports thus opening new vistas for business.
3. None of the above.
4. Tides destroy enemies of the country.

Q. What are tides?

1. Tides are channels of water moving in a particular direction in the oceans.
2. Tides are the natural flow of oceans.
3. Alternate rise and fall of water on the ocean surface is called tide.
4. Tides are periodic movements of ocean water due to the Moon and Sun’s gravity.

Q. Which of the following statements is correct?

1. A low tide is said to be experienced when water recedes from the shore.
2. The strong gravitational pull exerted by the Sun only is responsible for the formation of tides.
3. When the Sun, the Moon and the Earth are in the same line, the tides thus formed are called neap tides.
4. Kuroshio is a cold current and Oyashio is a warm current.

Q. What is the angle that the Sun and the Moon make with each other, with the Earth as the vertex during a neap tide?

1. 100 degrees
2. 45 degrees
3. 120 degrees
4. 90 degrees

Q. What are spring tides?

1. Spring tides are the tides which occur after a new moon only.
2. Spring tides are the tides which occur after a full moon only.
3. Spring tides are the tides which occur after a new or full moon.
4. Spring tides are the tides occurring in the first and third quarters of the moon's movement.

Q. How are tides formed?

1. Tides are formed due to the gravitational force exerted by the Sun and the Moon on the Earth.
2. Tides are formed due to the gravitational force exerted by the Sun on the Earth only.
3. Tides are fomed due to the gravitational force exerted by the Moon on the Earth only.
4. Tides are formed due to the alternating winds blowing over the ocean surface.