Answer all the questions.

1. Choose the correct answer:(1 × 5 = 5)
   1. Why do you think a puffed poori floats on oil?

      1. Because it is made of flour.
      2. Because the water in it evaporates.
      3. Because it is filled with air.
      4. All of these.

      
   2. Why do you think solar energy should be used in our daily lives?
      1. It can be harnessed easily.
      2. It is a renewable form of energy.
      3. It is available in plenty.
      4. All of these.
   3. Which of the following statements is not true concerning the people who are indulged in cleaning jobs in our society?
      1. They are uneducated and do not find jobs.
      2. They are underpaid.
      3. They are well respected by other people.
      4. All of the above.
   4. Which of the following spreads malaria?
      1. Culex mosquito.
      2. Anopheles mosquito.
      3. Aedes mosquito.
      4. All of these.
   5. Which of the following statements is not true with respect to the game shown in the picture?
      1. This is a team game.
      2. Players use their hands while playing.
      3. 7 players play from each team at a time.
      4. All of the above.
      
2. Give one-word answers for the following:(1 × 5 = 5)
   1. What do we call the technique of climbing down rocks with the help of ropes?
   2. Name the emperor whose cannon is kept at the Golconda Fort.
   3. Give an example of fossil fuel.
   4. Identify the design shown in the picture.
      
   5. Name the highest dam in India.
3. Answer the following in one sentence:(1 × 6 = 6)
   1. How can salt be separated from water?
   2. Why is it difficult to breathe while moving up in the mountains?
   3. What arrangements were made in the old days for taking out water from wells?
   4. What are pashmina shawls?
   5. List two household chores in which you can help your mother.
   6. What is migration?
4. Answer the following questions in brief:(2 × 11 = 22)
   1. See the picture and answer (1 + 1)

      1. What can you see in the picture? Why do ants behave like this?
      2. What enables the ants to show this behaviour?
      
   2. Identify the snake shown in the picture. State whether it is poisonous or non-poisonous.
      
   3. Suggest the method of storage for the following food items (1/2 × 4 = 2)
      1. Cereals
      2. Leafy vegetables
      3. Meat
      4. Fruit pulp
   4. Define rainwater harvesting. Why is its useful?
   5. Identify the person shown in the picture. What is he known for?
      
   6. What do the blue and green-brown portions depict on the picture of Earth?
      
   7. What do you understand by drought? Name two drought-prone states.
   8. While we blow on the glasses of spectacles, we observe a moist layer settle on their surface. What do you infer from this observation?
   9. What is the national game of India? How many players are required in each team for this game?
   10. Mention two effects of deforestation.
   11. What is urbanisation? State two reasons for the same.
5. Answer the following questions:(3 × 4 = 12)
   1. 1. Identify the organs given below— (1)
         
      2. Which organ of the alimentary canal is known as the site of the complete digestion of food and why? (1)
      3. What do you understand by assimilation of food? (1)

OR

1. 1. State the function of the tongue and mark the taste regions in the diagram given below— (2)
      
   2. How the tongue helps in digestion? (1)
2. What do you understand by vegetative propagation? Identify the vegetative parts used in the pictures given below— (2)
   
3. Give examples of two plants that reproduce by vegetative propagation. (1)
4. See the picture and answer— (1+1+1)

   i) Which crop is shown in the picture?

   ii) Is it a Rabi or a Kharif crop?

   iii) Give an example of a crop grown in the same season.

   
5. Why is Gregor Mendel called the ‘Father of Genetics’? Why did he choose pea plants for his experiments? Mention any two reasons. (1+2)

   OR

   The given picture shows which type of trait? What do you understand by inherited trait? Give an example for the same. (2+1)