Class 11 Geography MCQ Chapter 21 Temperature and Salinity of Ocean Water

Class 11 Geography MCQ Chapter 21 Temperature and Salinity of Ocean Water Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters Class 11 Geography MCQ Chapter 21 Temperature and Salinity of Ocean Water Question Answer and select need one. AHSEC Class 11 Geography MCQ Chapter 21 Temperature and Salinity of Ocean Water Question Answer in English Download PDF. AHSEC Class 11 Elective Geography MCQs English Medium.

Class 11 Geography MCQ Chapter 21 Temperature and Salinity of Ocean Water

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Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 11 Elective Geography Multiple Choice Solutions are part of All Subject Solutions. Here we have given AHSEC Class 11 Elective Geography Objective Type Question Answer in English for All Chapters, You can practice these here.

Temperature and Salinity of Ocean Water

Chapter: 21

1. What is the average temperature of the ocean surface?

(a) 22°C.

(b) 27°C.

(c) 30°C.

(d) 18°C.

Ans: (b) 27°C.

2. What is the main factor responsible for higher temperature?

(a) Wind.

(b) Currents.

(c) Latitude.

(d) Landmass.

Ans: (c) Latitude.

3. What is a halocline?

(a) Ocean current.

(b) Deep zone.

(c) Temperature layer.

(d) Layer of decreasing or increasing salinity.

Ans: (d) Layer of decreasing or increasing salinity.

4. What is the unit used to measure salinity?

(a) ppm.

(b) gm/L.

(c) ppt.

(d) mL/cm³.

Ans: (c) ppt.

5. Which sea has the highest salinity?

(a) Bay of Bengal.

(b) Red Sea.

(c) Baltic Sea.

(d) Arabian Sea.

Ans: (b) Red Sea.

6. What is the average salinity of the Atlantic Ocean?

(a) 32%.

(b) 30%.

(c) 33%.

(d) 36%.

Ans: (d) 36%.

7. What is the salinity of the Red Sea?

(a) 35%.

(b) 32%.

(c) 41%.

(d) 38%.

Ans: (c) 41%.

8. What is the main reason why sea water is denser?

(a) Strong winds.

(b) Higher temperature.

(c) Higher salinity.

(d) Low pressure.

Ans: (c) Higher salinity.

9. In thermocline movement, what does “thermo” mean?

(a) Heat.

(b) Density.

(c) Salinity.

(d) Oxygen.

Ans: (a) Heat.

10. Which sea has the lowest salinity?

(a) Arabian Sea.

(b) Bay of Bengal.

(c) Atlantic Ocean.

(d) Southern Ocean.

Ans: (b) Bay of Bengal.

11. What is the usual temperature of deep ocean water?

(a) 15–20°C.

(b) 10–15°C.

(c) 5–10°C.

(d) 0–5°C.

Ans: (d) 0–5°C.

12. The temperature of ocean water varies due to—

(a) Latitude.

(b) Depth.

(c) Ocean currents.

(d) All of these.

Ans: (d) All of these.

13. What is the approximate temperature at 4500 m depth from the surface of the ocean?

(a) 0°C.

(b) 2°C.

(c) 5.5°C.

(d) 20°C.

Ans: (b) 2°C.

14. What is the rate of temperature decrease in the thermocline layer?

(a) 2°C per 100 m.

(b) 1°C per 36 m.

(c) 10°C per 36 m.

(d) 5°C per 50 m.

Ans: (c) 10°C per 36 m.

15. What is the name of the layer just below the surface layer?

(a) Halocline.

(b) Isothermal layer.

(c) Density layer.

(d) Thermocline.

Ans: (d) Thermocline.

Parimol

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