7 Class.Geography.CW/HW.Chapter5.Water Surrounding the Earth.

Class 7.CW/HW/Assignment.Sheet.

Geography. Chapter 5.

Name of the Chapter : Water around us.

Q.Vocabs : a.Know and parse the words.

b.Short them and write the meaning of these hard words in English to English and English to Hindi.

Q.Keywords : Write the meanings of these words.

a.Fishing ground :  

b.Plankton : 
c.Stream flow : 

c.Surface run off : 
d.Transpiration : 

d.More you search and frame….

Something to Know

A. Tick ( ) the correct option. 

1. The water cycle is –

(a) the continuous movement of water. 

(b) passage of water through a house. 

(c) the life of an organism in water. 

(d) a static system

2. The three states of water are

(a) cloud, rain, river

(b) solid, liquid, gas

(c) salt water, fresh water, rain water

(d) waves, tides, currents

3  What turns water on the earth into vapours in the water cycle? 

(a) the core of the earth

(b) global warming

(c) the sun

(d) nuclear energy

4 When clouds get too heavy to hold water

(a) the water runs off. 

(b) the water falls on the earth. 

(c) more clouds are formed. 

(d) Water gets collected. 

5.  In coastal areas, warm ocean currents cause

(a) low temperature

(b) rainfall

(c) dryness

(d) global warming

B. Fill in the blanks. 

1. The largest natural source of water is ----

2. When the level of ocean water rises, it is a --- tide. 

3. ------port in India is an example of tidal port. 

4.  Tidal energy is a ---- source of energy   

5.  Cold currents flow along the ----- coast of the oceans. 
6.Water in the atmosphere is present in three states i.e..... ..... and ....
7.Plants derive ground water through .... system.
8.The 3 movements of ocean water are ...... and tides.

C. Give a technical term for each of the following statements. 

1.  The process in which water is converted to water vapors through heat of the sun

2 .The continuous circulation of water in the three spheres of the earth.

3.  A movement in the ocean in which water particles move up and down.

4.  It is the purest form of water. 
5.  Periodic rise and fall in the level of the ocean water.

D. Answer the following questions in brief. 

1.  On what factors does the height of a wave depend?

2.  Define an ocean current.

3. How are tides caused?

4.  Name the important components of the water cycle.

5. Name three valuable resources which are found in abundance in the ocean.
More
6.What is plankton?
7.Why is temperature in the coastal area different from that in the interior of the continent?
8.Which valuable resources are found in oceans?
9.Write the name of the major oceans on the earth.

E. Answer the following questions. 

1. How are tides useful to us? 

2. How are oceans beneficial to us in improving the quality of life? 

3. Explain the water cycle with the help of a diagram. 

4.  Explain three effects of ocean currents. 

5. Suggest four ways to help people affected by devastation due to Tsunami.

Q. Frame the Inside Questions/Answers of the chapter by your own.

Q.Value Based Question

We should respect and protect our oceans and seas.Oceans made Earth a habitable planet by giving birth to life. But we are turning our oceans into dumping grounds of waste material. 

What steps should be taken to prevent loss of precious marine life?  Give two suggestions to ban the disposal of waste material into oceans and seas.  . 

Q.Map Skill

Locate and label the following on the outline map of the world. 

(a) Labrador Current

(b) Gulf Stream

(c) North Atlantic Drift

(d) Grand Banks Fishing Ground

(e) Dogger Banks Fishing Ground

(f) The More you create and search.

Project : Something to Do anew

1. Prepare a small working model of ocean currents over a thermocol sheet.  Use colored electric wires to show distribution of cold and warm currents. 

2. Collect pictures of the different marine resources present in the ocean. 

3. Collect pictures of a coastal region showing devastation of land, trees, houses and lives caused huge oceanic waves. 

4. Collect pictures of coastal region in India where corrective action has been taken to preserve water and natural vegetation and wildlife.

5.And your innovative ideas you suggest to your teacher.