Chapter 13: Movements of Ocean Water — Online MCQ Test
GEOGRAPHY · Grade 11 · CBSE(NCERT)
Practice Chapter 13: Movements of Ocean Water with a free chapter-wise online MCQ test.
This chapter covers: Waves tides ocean currents marine circulation coastal processes navigation fishing El Nino climate influence.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 13: Movements of Ocean Water — Important Questions & Answers
Which of the following is the most direct cause of waves in the ocean?
- A. Earth's rotation
- B. Wind blowing over the water surface
- C. Difference in ocean salinity
- D. Movement of tectonic plates only
Answer: B. Wind blowing over the water surface
Waves are mainly generated by wind transferring energy to the ocean surface. Stronger winds generally produce larger waves.
Waves are mainly generated by wind transferring energy to the ocean surface. Stronger winds generally produce larger waves.
What is the vertical rise and fall of sea level caused by the gravitational pull of the Moon and the Sun called?
- A. Currents
- B. Waves
- C. Tides
- D. Surge
Answer: C. Tides
Tides are the periodic rise and fall of sea level due to the gravitational attraction of the Moon and the Sun.
Tides are the periodic rise and fall of sea level due to the gravitational attraction of the Moon and the Sun.
Why are tides important for port activities?
- A. They always prevent ships from entering harbours
- B. They help in clearing silt and aid navigation
- C. They reduce the salinity of seawater permanently
- D. They stop coastal erosion completely
Answer: B. They help in clearing silt and aid navigation
High tides raise water levels, which can help ships enter shallow harbours and can assist in flushing out silt. This is useful for navigation and port management.
High tides raise water levels, which can help ships enter shallow harbours and can assist in flushing out silt. This is useful for navigation and port management.
Which of the following statements about tides is correct?
- A. Spring tides occur only during the first quarter moon
- B. Neap tides occur when the Sun, Moon and Earth are in a straight line
- C. Spring tides have the maximum tidal range
- D. Tides are caused by winds alone
Answer: C. Spring tides have the maximum tidal range
Spring tides produce the greatest difference between high tide and low tide, so they have the maximum tidal range. They occur when the Earth, Moon and Sun are aligned.
Spring tides produce the greatest difference between high tide and low tide, so they have the maximum tidal range. They occur when the Earth, Moon and Sun are aligned.
Which statement about El Nino is most accurate according to NCERT?
- A. It is a local phenomenon affecting only Peru's coast and nothing else
- B. It is linked with the weakening of trade winds and can disturb monsoon patterns
- C. It occurs only during spring tides
- D. It is caused by underwater earthquakes
Answer: B. It is linked with the weakening of trade winds and can disturb monsoon patterns
El Nino is associated with weakening of the trade winds and warming of Pacific waters. It can have wider climate impacts, including effects on rainfall and monsoons.
El Nino is associated with weakening of the trade winds and warming of Pacific waters. It can have wider climate impacts, including effects on rainfall and monsoons.