REVISION -1 CLASS-4 EVS

Revision sheet                                            cl-4

I. Fill in the blanks:

1. ______________ helps to remove the waste material from the body.

2. Our heart beat ________ times in a minute.

3. ________ carries pure blood from the heart to different parts of the body.

4. Stomach takes about ___ to ________ hours for our body to digest the food.

5. Human beings normally breathe in and out about ________ times in 1 minute.

6. Liver produces a digestive juice known as ______________

7. Another name for outer Himalayas is ______________

8. _____________ forms the largest alluvial plain.

9. In the north of deccan plateau lies ____________ mountain range.

10. ____________ is the world’s highest mountain peak.

II. Tick the correct option:

1. Lungs are important (internal/external ) organs.

2. The (liver/brain) as controls over every activity of the body.

3. The job of the large intestine is (to digest food/ to throw away undigested food) from the body.

4. The shape of kidney is (bean/peas)

5. (Rib cage/spinal cage) protects our heart and lungs.

6. Lakshadweep island are made of (sand/corals).

7. The desert region of India is also called (Yellow desert/ Thar Desert)

8. Large roads that connect towns and cities are (highways/railways)

9. (Helicopters / aero planes  ) were used during the Uttrakhand floods and the Nepal earthquake.

10. The Television was invented by (wright brothers/John Logia Beard)

III. Make the correct sequence/order of the organs of the following:

1. Passage of air inside the body

lungs, windpipe, nose

2. Passage of food inside the body

Stomach, food pipe, small intestine, mouth rectum, large intestine

IV. One word answer :

1. Sound of the heart while pumping the blood is ______________

2. Name the internal organ which is spongy bag filled with air ____________

3. The strong fibres that connect muscles to bones ____________

4. Name the blood vessels that is blue in colour which carry the impure blood to the heart ____________

5. Where are the strongest muscles present in the human body _____________

6. Skull protects the _________

7. Name the longest coiled tube like structure of the digestive system___________

8. Planting trees is known as ________________

9. The largest state and small state of India are _________________ and __________

10. Himalayas in Sanskrit means ‘Abode of Snow’.

11. The steam engine was invented by _____________.

Give reasons:

1. Why do we compare human body with a machine?

2. Why brain is consider as an important organ of the human body?

3. Why we should be careful while disposing waste and how does increasing population affect our surroundings?

4. Why should we not use plastic bags? What are the alternatives for plastic bags?

VI. Answer these questions:

1. What is hygiene?

2. What are the causes of throwing solid wastes in open area?

3.What are non-biodegradable materials give examples?

4. What are bio-degradable materials  give examples?

5. Name three Rs used to protect the environment?

6. What does dirty stagnant water produce?

7. Draw concept map on keep our surroundings clean and healthy.

8. What do you mean by compost?

9. What is pollution? Write different types of pollution?

10. Write the full forms of WWW, CNG,  NHAI , STD ,ISD, PIN, Email and G.T. Road?