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Important Questions: Water - Class 7 MCQ


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10 Questions MCQ Test Social Studies (SST) Class 7 - Important Questions: Water

Important Questions: Water for Class 7 2024 is part of Social Studies (SST) Class 7 preparation. The Important Questions: Water questions and answers have been prepared according to the Class 7 exam syllabus.The Important Questions: Water MCQs are made for Class 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Important Questions: Water below.
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Important Questions: Water - Question 1

During the full moon and new moon days, the sun, the moon and the earth are in the same line and the tides are highest. These tides are called

Detailed Solution for Important Questions: Water - Question 1

During these Moon phases, the solar tide coincides with the lunar tide because the Sun and the Moon are aligned with Earth, and their gravitational forces combine to pull the ocean's water in the same direction. These tides are known as spring tides or king tides.

Important Questions: Water - Question 2

What can cause underwater landslides?

Detailed Solution for Important Questions: Water - Question 2
Underwater landslides can be triggered by earthquakes or volcanic eruptions, which disturb the ocean floor and displace large amounts of sediment and rock. These landslides can generate tsunamis and significantly alter underwater topography.
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Important Questions: Water - Question 3

What fraction of earth is covered by water

Detailed Solution for Important Questions: Water - Question 3

About 71 percent of the Earth's surface is water-covered, and the oceans hold about 96.5 percent of all Earth's water. Water also exists in the air as water vapor, in rivers and lakes, in icecaps and glaciers, in the ground as soil moisture and in aquifers.

Important Questions: Water - Question 4
Which factor does NOT affect the height of ocean waves?
Detailed Solution for Important Questions: Water - Question 4
The height of ocean waves is primarily influenced by the wind's speed, duration, and the fetch (distance over which the wind blows). Temperature of the water does not directly affect wave height, although it can influence other aspects of ocean dynamics.
Important Questions: Water - Question 5
What is one of the primary roles of ocean currents?
Detailed Solution for Important Questions: Water - Question 5
Ocean currents play a crucial role in redistributing heat around the planet by moving warm water from the equator toward the poles and bringing cold water from the poles back toward the equator. This process helps regulate global climate and weather patterns.
Important Questions: Water - Question 6

The ____ originate near the equator and move towards the pole

Detailed Solution for Important Questions: Water - Question 6

Warm ocean currents flow away from the equatorial region on the western side of ocean basins. The Gulf Stream in the North Atlantic and the KuroshioCurrent in the North Pacific are examples of warm currents. Of all the warm currents, the Gulf Stream has been studied most extensively.

Important Questions: Water - Question 7

____ are streams of water flowing constantly on the ocean surface in definite directions

Detailed Solution for Important Questions: Water - Question 7

Ocean currents are primarily horizontal water movements. Ocean currents flow for great distances, and together, create the global conveyor belt which plays a dominant role in determining the climate of many of the Earth's regions.

Important Questions: Water - Question 8

The Labrador Ocean current is ___ current while the Gulf Stream is a ___ current

Detailed Solution for Important Questions: Water - Question 8

The Labrador Current is a cold current in the North Atlantic Ocean which flows from the Arctic Ocean south along the coast of Labrador and passes around Newfoundland, continuing south along the east coast of Nova Scotia. It is a continuation of the West Greenland Current and the Baffin Island Current.

Important Questions: Water - Question 9

The average salinity of the oceans is

Detailed Solution for Important Questions: Water - Question 9

Seawater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of approximately 3.5%, or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts (mostly, but not entirely, sodium chloride) dissolved in it.

Important Questions: Water - Question 10

Which river is the longest river in the world

Detailed Solution for Important Questions: Water - Question 10

The River Nile is the longest river in the world. It measures 6,695 kilometres from its source in Burundi, along the White Nile, to its delta on the Mediterranean Sea. Officially, the shortesr river is the D River, Oregan, USA, which is just 37 metres long.

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