Worksheet: Water (Oceans)

Fill in the Blanks

Q1: The hydrological cycle is also known as the __________ cycle.

Q2: About 71% of the planetary water is found in the __________.

Q3: The remaining freshwater is found in glaciers, groundwater, lakes, soil moisture, atmosphere, streams, and within __________.

Q4: Nearly 59% of the water that falls on land returns to the atmosphere through __________.

Q5: The renewable water on Earth is __________, but the demand is increasing.

Q6: The continental shelf typically ends at a steep slope called the __________.

Q7: The deepest parts of the oceans are known as __________.

Q8: The boundary region in the ocean where there is a rapid decrease in temperature is called the __________.

Q9: Salinity refers to the total amount of __________ in the water.

Q10: The highest salinity is recorded in the __________ Sea due to high evaporation.

Assertion and Reason Based

Q1: Assertion: The hydrological cycle impacts the ocean floors through erosion.
Reason: Water movement from precipitation and runoff can lead to the erosion of landforms.
(a) Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) The assertion is true, but the reason is false.
(d) The assertion is false, but the reason is true.

Q2: Assertion: Salinity in the oceans is influenced by evaporation and precipitation.
Reason: Wind has no impact on the salinity of ocean water.
(a) Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) The assertion is true, but the reason is false.
(d) The assertion is false, but the reason is true.

Q3: Assertion: The Indian Ocean has a low salinity trend in the Bay of Bengal.
Reason: The Bay of Bengal experiences high evaporation.
(a) Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) The assertion is true, but the reason is false.
(d) The assertion is false, but the reason is true.

Q4: Assertion: Salinity generally increases with depth in the ocean.
Reason: Water at depth is influenced by the input of fresh waters.
(a) Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) The assertion is true, but the reason is false.
(d) The assertion is false, but the reason is true.

Q5: Assertion: The thermocline is the boundary region with a rapid decrease in temperature.
Reason: About 90 percent of the total volume of water is found above the thermocline.
(a) Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) The assertion is true, but the reason is false.
(d) The assertion is false, but the reason is true.

Very Short Answer Type Questions

Q1: Define the hydrological cycle.

Q2: Name the five major oceans on Earth.

Q3: What is the purpose of the continental shelf?

Q4: Describe the thermocline.

Q5: Explain the factors affecting temperature distribution in ocean waters.

Q6: What is the significance of ocean currents in temperature distribution?

Q7: How does the shape of the Pacific Ocean influence its salinity?

Q8: What is the primary source of salinity in coastal regions?

Q9: Define the halocline.

Q10: How does increasing salinity affect seawater density?

Short Answer Type Questions

Q1: Explain the components and processes of the hydrological cycle.

Q2: Describe the four major divisions of the ocean floors.

Q3: Discuss the variations in the salinity of the Pacific Ocean.

Q4: What are submarine canyons, and where are they often found?

Q5: Explain the factors affecting temperature distribution in ocean waters.

Q6: How does the thermocline impact the distribution of temperature in the ocean?

Q7: Discuss the vertical distribution of salinity in ocean waters.

Q8: How does the hydrological cycle influence the Earth's climate system?

Long Answer Type Questions

Q1: Discuss the significance of the hydrological cycle in maintaining the balance of Earth's ecosystems.

Q2: Explain the impact of the hydrological cycle on the ocean floors and its role in shaping oceanic relief.

Q3: Describe the horizontal and vertical distribution of temperature in ocean waters, and how it affects marine life.

Q4: Analyze the factors affecting ocean salinity and their regional variations, with a focus on the Pacific Ocean.

You can access the solutions to this worksheet here.