Available Answers

1. 1.

   State True or False.

   1. Heart, kidneys and blood are parts of the circulatory system.
   2. The first two pairs of ribs in the ribcage are called floating ribs.
   3. People suffering from obesity should cut down on fatty food items.
   4. Rice can be adulterated with small stones.
   5. Mango seeds are dispersed by animals and humans.
   6. Air occupies space, but has no weight.
   7. Neon gas is used in glowing signboards.
2. 2.

   Identify the following pictures. Answer the questions that follow.

   1. Where is it located?	2. In humans, it is made of how many bones?	3. How is the teeth disease caused?
   4. Name its whorls?	5. How does it get dispersed?	6. What is its feeding habit?
   7. What are the conditions required by it?	8. When and why does it occur?	9. Which is the correct way of picking up the box?

    

3. 3.

   Fill in the blanks.

   1. The ___________ (heart/kidney) is a muscular organ that pumps blood.
   2. The skull is attached to the _____________ (ribcage/backbone).
   3. The ___________ (shinbone/kneecap) protects the knee from getting hurt.
   4. The ___________ (skeleton/muscles) give shape to the body.
   5. The ___________ (hinge/bell and socket) joint is present in the elbow.
   6. Skeletal muscle is also referred to as _____________ (unstriped/striped) muscle.
   7. Rickets is caused due to the deficiency of vitamin ______ (D/E).
   8. Chilli powder is adulterated with _________ (brick powder/pumpkin pulp).
   9. Bisexual flowers are also referred to as _____________ (homophrodites/hermaphrodites).
   10. The seed leaves inside a seed are called ___________ (cotyledons/fruits).
   11. Carrot and turnip are grown from ___________ (leaves/roots).
   12. The clear liquid obtained in sedimentation is called ___________ (sediment/supernatant).
   13. A woodpecker is a ___________ (carnivore/omnivore).
   14. The organisms that breakdown dead and decaying organisms are called ___________ (scavengers/decomposers). 
4. 4.

   How can you keep your heart healthy?

5. 5.

   Explain the four whorls of a flower with the help of a diagram.

6. 6.

   Write a note on dispersal of seeds.