NCERT Class 9 Social Science MCQ Chapter 10 Oceans and Life

NCERT Class 9 Social Science MCQ Chapter 10 Oceans and Life Solutions English Medium As Per New Syllabus. NCERT Class 9 Social Science MCQ Chapter 10 Oceans and Life Notes to each chapter is provided in the list so that you can easily browse throughout different chapter NCERT Class 9 Social Science MCQ Question Answer Download PDF and select needs one. CBSE Class 9 Social Science Multiple Choice Solutions.

NCERT Class 9 Social Science MCQ Chapter 10 Oceans and Life

Also, you can read the CBSE book online in these sections Solutions by Expert Teachers as per (CBSE) Book guidelines. NCERT Class 9 Social Science Objective Type Solutions. These solutions are part of NCERT All Subject Solutions. Here we have given NCERT Class 9 Social Science MCQs in English Medium Solutions for All Subject, You can practice these here.

Oceans and Life

Chapter – 10

Part – II: Understanding Society India and Beyond

MCQ

1. What are the physical landforms of the ocean floor collectively called?

(i) Continental Drift.

(ii) Ocean Relief/Submarine Relief.

(iii) Marine Currents.

(iv) Tidal Range.

Ans: (ii) Ocean Relief/Submarine Relief.

2. Which is the deepest place on Earth, located in the Pacific Ocean?

(i) Mariana Trench.

(ii) Sunda Trench.

(iii) Puerto Rico Trench.

(iv) Java Trench.

Ans: (i) Mariana Trench.

3. What is the shallow, gently sloping submerged edge of a continent rich in marine life and oil reserves called?

(i) Abyssal Plain.

(ii) Continental Slope.

(iii) Continental Shelf.

(iv) Ocean Trench.

Ans: (iii) Continental Shelf.

4. An underwater flat-topped mountain formed by the erosion of a former seamount is known as a:

(i) Seamount.

(ii) Guyot.

(iii) Abyssal Hill.

(iv) Submarine Canyon.

Ans: (ii) Guyot.

5. What feature marks the true edge of a continent with a steep incline leading down to the deep ocean floor?

(i) Continental Shelf.

(ii) Continental Slope.

(iii) Abyssal Plain.

(iv) Mid-Ocean Ridge.

Ans: (ii) Continental Slope.

6. What is the study and mapping of the underwater topography of ocean floors and water bodies called?

(i) Hydrology.

(ii) Oceanography.

(iii) Cartography.

(iv) Bathymetry.

Ans: (iv) Bathymetry.

7. What is the world’s longest underwater mountain range system?

(i) Andes Mountain Range.

(ii) Mid-Ocean Ridge.

(iii) Hawaiian Ridge.

(iv) Emperor Seamount.

Ans: (ii) Mid-Ocean Ridge.

8. Ocean waves are primarily generated by:

(i) Underwater earthquakes.

(ii) Salinity differences.

(iii) Ocean tides.

(iv) Winds blowing across the water surface.

Ans: (iv) Winds blowing across the water surface. 

9. The horizontal distance between two consecutive wave crests or troughs is called:

(i) Wave Height.

(ii) Wavelength.

(iii) Wave Period.

(iv) Wave Frequency.

Ans: (ii) Wavelength.

10. Which coastal landforms are created by the erosional action of ocean waves?

(i) Sea caves, sea arches, sea stacks, and stumps.

(ii) Deltas and meanders.

(iii) Sand dunes and lagoons.

(iv) Guyots and seamounts.

Ans: (i) Sea caves, sea arches, sea stacks, and stumps.

11. Giant, destructive ocean waves caused by undersea earthquakes or volcanic eruptions are called:

(i) Tides.

(ii) Currents.

(iii) Tsunamis.

(iv) Spring Tides.

Ans: (iii) Tsunamis. 

12. The maximum vertical height reached by a tsunami wave as it moves inland along the coast is called:

(i) Trough Height.

(ii) Run-up Height.

(iii) Tidal Range.

(iv) Crest Level.

Ans: (ii) Run-up Height.

13. The rhythmic rise and fall of ocean water levels is caused by the gravitational pull of the:

(i) Sun and Moon.

(ii) Earth and Mars.

(iii) Venus and Earth.

(iv) Jupiter and Sun.

Ans: (i) Sun and Moon. 

14. Spring tides occur when:

(i) Daily weather patterns shift.

(ii) Wind speeds drop to zero. 

(iii) The Moon is at a right angle to the Sun.

(iv) The Sun, Earth, and Moon align in a straight line.

Ans: (iv) The Sun, Earth, and Moon align in a straight line.

15. Why is the difference between high tide and low tide smaller during neap tides?

(i) The gravitational pulls of the Sun and Moon act in the same direction.

(ii) The gravitational pulls of the Sun and Moon act at right angles to each other.

(iii) Earth’s rotation slows down.

(iv) Ocean currents stop moving.

Answer: (ii) The gravitational pulls of the Sun and Moon act at right angles to each other.