CBSE Class 7 Geography Water Fresh And Saline Worksheet

1. On an outline map of the world, identify and mark the following oceans:

a. The mariana trench is located in this ocean.

b. The busiest ocean in the world.

c. The warmest ocean.

d. The smallest ocean.

e. It is also known as the southern Ocean

2. Write down any three ways in which you can use water judiciously in your homes.

3. When is the world water day celebrated?

Q1. What is terrarium?

Q2. What is water cycle? Draw the diagram also.

Q3. Name sources of fresh water?

Q4 What is salinity?

Q5. On which day is world water day celebrated?

Q6. How are waves formed?

Q7. What is Tsunami?

Q8. Explain spring and neap tides?

Q9. What is the importance of tides?

Q10 Give an account of ocean currents?

Q11. On physical map of the world mark warm &cold currents.

Q12. Distinguish between:-

     a) Waves & ocean currents

     b) Waves &tides

Q13.Give reasons:-

     a) ports of n. w. Europe remain open through out the year.

     b) Ocean currents influence navigation.

     c) deserts are located near cold currents.

Q14 Fill in the blanks:-

      a)The shape and size of waves depends on__________.

      b)The movement of ocean water depends on__________.

      c)The force of tide is used to generate_______.

     d)_________strait connects arctic& pacific ocean.

Q15 Show on world map-------gulf stream, north atlantic drift,Brazilian warm current, kurushio warm current, Labrador c. current California cold current, canary current, west wind drift, oyashio c. current

Q16. How do tides help in trade and fishing?

Q17. Fresh water is precious because it constitutes a small quantity of water present on the earth’s surface must make efforts to save this valuable resource. Discuss the ways to save water in the class and amongst your friends.

I. Choose the correct answer.

1. ________ is celebrated as world water-day.

(a) March 22                  (b) June 5                   (c) April 22

2. Tsunami is a ________ word that means “Harbour Waves”

(a) German                    (b) French                    (c) Japanese

3. The Tsunami of 2004 caused wide spread damage in the coastal areas of ________.

(a) Brazil                        (b) India                     (c) Britain

4. Dead sea in ________ has salinity of 45 parts per thousand. Swimmers can float in it because the increased salt content makes it dense.

(a) India                        (b) Indonesia               (c) Israel

II. Fill in the blanks

1. _________________ is an artificial enclosure for keeping small house plants.

2. ______________ causes evaporation of water vapour.

3. The major sources of fresh water are the rivers, ____________ springs and __________.

4. The water of the earth closer to the moon gets pulled under the influence of the moon’s ________________ and causes high tide.

5. When the sun, the moon and the earth are in the same line and the tides are highest. They are called as __________________ tide.

6. High tides help in navigation and _____________________.

7. The rise and fall of water due to tides Is being used to generate _______________.

8. The areas where a warm and cold current meet experience ______________ weather making it difficult for navigation.

III. True or false

1. The movements that occur in oceans can be broadly categorized as waves, tides and currents.

2. During the full moon and new moon days, the sun, the moon and the earth are in the same line and caused low tides.