• Ocean - class-VIII online quiz
Back
0

Ocean - class-VIII online quiz

Description: ocean
Number of Questions: 17
Created by:
Tags: hydrosphere ocean and man natural hazards : understanding of disaster, management in practice water unstable earth tides and ocean currents oceans and fishing natural disasters lithosphere understanding disaster social science natural disasters - public awareness for disaster risk reduction lithosphere: endogenic processes geography ocean water on the earth disaster management
Start the Quiz
Attempted 0/17 Correct 0 Score 0
‹
›

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

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

  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

Show answer
Correct Option: A

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

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

  1. Bore

  2. Tides

  3. Waves

  4. Water drift

Show answer
Correct Option: B

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

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

  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

Show answer
Correct Option: A

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

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

  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

Show answer
Correct Option: D

Spring tides are caused, when _____________________.

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

  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

Show answer
Correct Option: A

Neap tides occur _______________.

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

  1. On new and full moon days

  2. On first and third quarters of the month

  3. Twice daily

  4. On every full moon

Show answer
Correct Option: B

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

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

  1. The spring and the neap tides

  2. The bores

  3. Ebb tides

  4. Oceanic currents

Show answer
Correct Option: A

Tides are caused because of ___________________.

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

  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

Show answer
Correct Option: B

Which of the following is a type of wave ____________.

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

  1. Ripples

  2. Seas

  3. Swells

  4. All are the types of waves

Show answer
Correct Option: D
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.

Which is the busiest of Ocean trade routes ?

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

  1. North Pacific Ocean

  2. Indian Ocean

  3. Arctic Ocean

  4. North - Atlantic Ocean

Show answer
Correct Option: D
Explanation:
Atlantic Ocean
The busiest ocean from the point of view of trade is Atlantic Ocean.

Large movements of ocean water from places of warm temperature to low temperature or vice versa are ______________.

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

  1. Drifts

  2. Ocean currents

  3. Waves

  4. Tides

Show answer
Correct Option: B

Kuroshio current is available in ___________.

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

  1. North Pacific Ocean

  2. North Atlantic Ocean

  3. North Indian Ocean

  4. None of these

Show answer
Correct Option: A
Explanation:

The north equatorial current turns northward to the obstruction of Philippines and thus gives birth to the Kuroshio current which flows from Taiwan to Ryuku ridge at 30 degrees N latitude. The Kuroshio current is a warm current. The average temperature and salinity are 8 degrees and 35% respectively.

Which factors influence ocean currents?

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

  1. Earth's rotation

  2. Winds across ocean

  3. Density of water

  4. All of the above

Show answer
Correct Option: D
Explanation:

Factors Influencing Nature and Movement of Ocean Currents:

1. Factors related to the earth’s rotation: Gravitational force and force of deflection.

2. Factors originating within the sea: Atmospheric pressure, winds, precipitation, evaporation and insolation.

3. Factors originating within the sea: Pressure gradient, temperature difference, salinity, density and melting of ice.

4. Factors modifying the ocean currents: Direction and shape of the coast, seasonal variations and bottom topography.

Sea-waves are undulated movements of water on the surface of the sea due to ________________.

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

  1. rotation of earth

  2. difference in temperature

  3. friction of wind on the surface

  4. None of these

Show answer
Correct Option: C

Tides in the ocean will be highest when __________________.

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

  1. it is full Moon

  2. Moon is eclipsed

  3. Moon and Sun are pulling at right angles to the Earth

  4. Moon is in new phase

Show answer
Correct Option: D

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

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

  1. Currents are rivers in the sea

  2. The water moves forward and the currents are felt at the depth as well

  3. They are caused by the unequal temperature of equatorial and polar regions

  4. Generally there is scanty rainfall over the coastal areas where the warm currents flow

Show answer
Correct Option: D

Who should be evacuated first when hit by a tsunami?
This question has multiple answers.

geography ocean tsunami and floods movements of ocean and sea water oceanic circulations disasters - case studies man made disaster

  1. Children

  2. Aged persons

  3. Men

  4. Physically handicapped

Show answer
Correct Option: A,B,D
Explanation:

Initially Children, Aged Persons and Physically handicapped peoples should be evacuated first because they might panic and may have difficulties in finding a way out. They need external helps to evacuate.

- Hide questions
ADVERTISEMENT

Find more quizzes from top tags

general knowledge
3615 Quizzes
119858 Questions
 technology
307 Quizzes
36705 Questions
 sports
963 Quizzes
19148 Questions
 history
1187 Quizzes
13475 Questions
 physics
598 Quizzes
13441 Questions
 biology
1160 Quizzes
12174 Questions
 science & technology
551 Quizzes
11015 Questions
 chemistry
490 Quizzes
9892 Questions
 maths
518 Quizzes
9324 Questions
 softskills
0 Quizzes
7131 Questions