Tag: tsunami and floods

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Questions Related to tsunami and floods

Multiple choice geography ocean movements of ocean and sea water oceanic circulations circulation of ocean water oceans : temperature, salinity and density tsunami and floods

Neap tides, i.e., small tides are caused when _____________________.

  1. Sun, and moon are at right angles

  2. Sun, earth and moon are in one line

  3. There is new moon

  4. There is full moon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Neap tides occur when the sun and moon are at right angles relative to the earth, causing their gravitational forces to partially cancel each other out, resulting in lower high tides.

Multiple choice geography ocean movements of ocean and sea water oceanic circulations circulation of ocean water oceans : temperature, salinity and density tsunami and floods

The rise and fall of the sea-water at the surface at constant intervals is known as __________.

  1. Bore

  2. Tides

  3. Waves

  4. Water drift
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tides are the periodic rise and fall of sea levels caused by the gravitational forces exerted by the moon and the sun, and the rotation of the earth.

Multiple choice geography ocean movements of ocean and sea water oceanic circulations circulation of ocean water tsunami and floods

Which of the following statements is not correct about the ocean currents?

  1. Currents do not exert an influence on the climatic conditions of the coasts

  2. Winds play an important role in the circulation of the ocean currents

  3. Currents are produced by the differences in the density of the sea water at different depths

  4. Direction of ocean currents is influenced by the shape and position of coasts
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ocean currents significantly influence the climate of coastal regions by transporting warm or cold water, which affects air temperature and humidity.

Multiple choice geography ocean movements of ocean and sea water oceanic circulations circulation of ocean water tsunami and floods

Which of the following is not an effect of the ocean currents?

  1. They effect commerce because they keep the harbours open even during winter

  2. Water of the ocean is kept pure

  3. Warm equatorial currents lower the temperature of the places through which they pass

  4. They do not effect rainfall over the coasts
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ocean currents have a profound effect on coastal rainfall; for example, warm currents often increase moisture and rainfall, while cold currents can lead to aridity.

Multiple choice geography ocean movements of ocean and sea water oceanic circulations circulation of ocean water oceans : temperature, salinity and density tsunami and floods

Spring tides are caused, when _____________________.

  1. The earth, moon and sun are in a line

  2. The moon and sun are on a line

  3. The sun and moon are at right angles to each other and the earth is at the centre

  4. There is new moon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Spring tides occur when the earth, moon, and sun are aligned, causing their gravitational forces to combine and produce higher high tides and lower low tides.

Multiple choice geography ocean movements of ocean and sea water oceanic circulations circulation of ocean water oceans : temperature, salinity and density tsunami and floods

Neap tides occur _______________.

  1. On new and full moon days

  2. On first and third quarters of the month

  3. Twice daily

  4. On every full moon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Neap tides occur during the first and third quarters of the moon phase, when the sun and moon are at right angles to the earth.

Multiple choice geography ocean and man movements of ocean and sea water oceanic circulations circulation of ocean water oceans : temperature, salinity and density tsunami and floods

The tides in the seas are influenced both by the sun and the moon. This fact is proved by ________________.

  1. The spring and the neap tides

  2. The bores

  3. Ebb tides

  4. Oceanic currents
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The variation between spring and neap tides is evidence that both the sun and the moon exert gravitational influence on the earth's oceans.

Multiple choice geography ocean movements of ocean and sea water oceanic circulations circulation of ocean water oceans : temperature, salinity and density tsunami and floods

Tides are caused because of ___________________.

  1. Gravitational pull of the sun

  2. Gravitational pull of the moon

  3. Gravitational pull of the earth towards its axis

  4. Difference in the temperatures of water of the sea at different depths
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

While the sun also exerts a gravitational pull, the moon is the primary driver of tides due to its proximity to the earth.

Multiple choice geography ocean and man movements of ocean and sea water oceanic circulations circulation of ocean water oceans : temperature, salinity and density tsunami and floods

Which of the following is a type of wave ____________.

  1. Ripples

  2. Seas

  3. Swells

  4. All are the types of waves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ripples are the instant effect of wind on water and they die down as quickly as they form, as the surface tension of the water dampens their efforts.

Waves always travel in the same direction as the wind is blowing: if the wind changes then the waves change with it. Wave size is determined by the strength of the wind, the length of time it has been blowing and the distance it has blown over or the ‘fetch’.

When strong winds blow for longer than a few hours, it gives the water sufficient energy that it then takes on a character of its own. This character and movement is known as swell, and it will march across open areas of water independent of the wind.