- The largest Tsunami wave travels at the speed of
(a) more than 700 km per hour
(b) more than 500 km per hour
(c) more than 250 km per hour
(d) more than 100 km per hour
2. The rhythmic rise and fall of ocean water twice in a day is known as
(a) tide
(b) wave
(c) ocean current
(d) none of these
3. The Labrador and Gulf stream are the examples of:
(a) Tides
(b) Ocean currents
(c) Tsunami
(d) Waves
3. Which is the process through which water continuously changes its form?
(a) Water cycle
(b) Food cycle
(c) Rain
(d) All of these
4. Which water is salty?
(a) River water
(b) Pond water
(c) Rain water
(d) Sea water
5. Which one of the following is an artificial enclosure for keeping small house plants?
(a) Terrarium
(b) Thermosphere
(c) Climate
(d) Evaporation
6. Sea water contains
(a) 97.3% of salt
(b) 2% of salt
(c) 0.68% of salt
(d) 0.973% of salt
7. Ocean water is calm and still – False
8. We have about 0.68% of water as ground water-True
9. Tsunami can be caused by underwater landslides –True
10. Tides are highest on a full or new moon day – True
11. Cold currents carry water from lower latitudes to poles- False
12. Tides help in generating electricity – True
13. Which day of the year is celebrated as Water Day?
(a) 26 January
(b) 15 January
(c) 15 August
(d) 22 March
14. The movements that occur in oceans can be broadly called
(a) wave
(b) circulation
(c) water cycle
(d) all of these
15. Which is the Japanese word which means ‘Harbour Waves’?
(a) Tsunami
(b) Sea wave
(c) Ocean wave
(d) None of these
16. When did Tsunami strike the Indian ocean?
(a) 26 December, 2004
(6) 26 December, 2005
(c) 26 December, 2006
(d) 26 December, 2007
17. Match the contents of Column A with that of Column B
| Column A | Column B |
| 1. Spring tides | (а) Between Europe and Africa |
| 2. Gulf stream | (b) Cold current |
| 3. Labrador current | (c) Low tide |
| 4. Neap tides | (d) High tide |
| 5. Mediterranean sea | (e) Warm current |
Answer:
Column A Column B
1. Spring tides (d) High tide
2. Gulf stream (e) Warm current
3. Labrador current (b) Cold current
4. Neap tides (c) Low tide
5. Mediterranean sea (а) Between Europe and Africa