Ocean Salinity and the Factors Affecting It

Q. Which of the following instruments are used to measure salinity?

1. Refractometer
2. Salinometer
3. Anemometer
4. Hydrometer

Q.

Which is not a source of fresh water?

1. Glaciers and ice sheets

2. Groundwater

3. Surface runoff

4. Oceans

Q. Why is the northern part of the Red Sea more saline than its southern part?

1. The northern part of the Red Sea recieves water from Gulf of Suez.
2. The rate of evaporation is lower in the northern part of the Red Sea.
3. The nothern part of the Red Sea is a landlocked sea.
4. Salinity and temperature currents of Indian Ocean largely regulate the salinity and temperature of southern end.

Q. Which line joins the points in the ocean that have the same degrees of salinity?

1. Isobar
2. Isoline
3. Isohaline
4. Isoheight

Q. Which of the following water bodies host freshwater in them?

1. Groundwater
2. Glaciers
3. Rivers
4. Seas

Q. What is the primary source of salt formation in the ocean?

1. Runoff from the land
2. Rain in the sea
3. Openings in the sea floor
4. Ship cargo leakage

Q. How much salt would 1 kg of Mediterranean sea water yield?

1. 254 g
2. 123 g
3. 73 g
4. 39 g

Q. Pick the two regions which have lower ocean salinity compared to others.

1. Polar regions
2. Temperate regions
3. Tropical regions
4. Equatorial regions

Q. Salt in the ocean comes from which of the following sources?

1. Runoff from the land
2. Rain in the sea
3. Openings in the sea floor
4. Ship cargo leakage

Q. Explain the factors affecting the salinity of ocean water.

Q. Pick the right statements from the following:

1. Equatorial waters are less saline than polar waters.
2. Polar water experience less evaporation.
3. Equatorial waters are supplied less fresh water.
4. Polar ice caps make the water more salty.

Q. Which of the following factors affect salinty of ocean water?

1. Season
2. Winds
3. Gravity
4. Ocean currents

Q. Which layer of the ocean is most likely to be the densest?

1. Surface water
2. First layer
3. Second layer
4. Third layer

Q. Which among the following statements is/are true about the role of oceans in the global water cycle?

1. Oceans are the main thermal regulating element of the climate system.
2. Nearly 86% of global evaporation comes from the oceans.
3. The water cycle has a significant impact on ocean salinity, and thus density, circulation, stratification, and mixing.
4. Alterations to the global water cycle cannot be studied due to technological and logistical constraints.

Q. __________ is a measure of salt contained in grams in a thousand grams or one kg of water.

1. Basicity
2. Alkalinity
3. pH
4. Salinity

Q. _________ is a line joining the points in the ocean having the same degree of salinity.

1. Isosaline
2. Isohaline
3. Pesosaline
4. Mesosaline

Q.

It is found that the salt content in oceans and seas is increasing gradually. What may be the reason?

Q. __________ is a measure of salt contained in grams in a thousand grams or one kg of water.

1. Basicity
2. Alkalinity
3. Salinity
4. pH

Q. Assertion[A]: The Arabian Sea is much saltier than the neighbouring Bay of Bengal.

Reason[R]: The continuous input of freshwater from moonsoon rains and the Ganga-Brahmaputra river systems makes the Bay of Bengal relatively less saline.

Read the above given statements carefully and select the option that is true.

1. Both A and R are true. R is the incorrect explanation of A.
2. Both A and R are true. R is the correct explanation of A.
3. A is false but R is true.
4. A is true but R is false.

Q. Salt in the ocean comes from which of the following sources?

1. Runoff from the land
2. Rain in the sea
3. Openings in the sea floor
4. Ship cargo leakage

Q. __________ is a measure of salt contained in grams in a thousand grams or one kg of water.

1. Basicity
2. Alkalinity
3. pH
4. Salinity

Q. Landlocked seas have lower salinity compared to open seas.

1. True
2. False

Q.

___________ is a rift valley.

Q. Salt in the ocean comes from which of the following sources?

1. Runoff from the land
2. Rain in the sea
3. Openings in the sea floor
4. Ship cargo leakage

Q. 'X' is a waterbody in Southwest Asia. Its salinity is almost ten times the average salinity of the world's oceans. Except for a few unicellular organisms, 'X' is devoid of any life forms. It is one of the places having the lowest elevations on the Earth. Low rainfall, low supply of freshwater, and high evaporation are the reason for its high salinity. Identify 'X' in the above given question.

1. Red Sea
2. Black Sea
3. Dead Sea
4. Caspian Sea

Q. The amount of freshwater that enters the ocean through rain and rivers, and the extent of evaporation affects the salinity of an ocean.

1. False
2. True

Q. __________ is a measure of salt contained in grams in a thousand grams or one kg of water.

1. pH
2. Salinity
3. Basicity
4. Alkalinity

Q. Which among the following statements is/are true about the role of oceans in the global water cycle?

1. Oceans are the main thermal regulating element of the climate system.
2. Nearly 86% of global evaporation comes from the oceans.
3. The water cycle has a significant impact on ocean salinity, and thus density, circulation, stratification, and mixing.
4. Alterations to the global water cycle cannot be studied due to technological and logistical constraints.

Q. Which among the following oceanographic instruments is used to measure ocean salinity?

1. Flurometer
2. Thermometer
3. Refractometer
4. Bathymetry

Q. Which of the following landforms are likely to be formed near the sea?

1. Floodplains
2. Caves
3. Fjords
4. Estuaries