Grade-3 Science, Chapter-4 Plants in the Surroundings


Chapter 4
Topic: Plants  in the Surroundings

 Section A

 Label the parts of the seed in the picture given below.
         
 Give one-word answers

(a) The part of the plant that supports the plant.
Ans- Stem

(b) The part of the plant that anchors the plant to the ground.
 Ans- Root

(c) This part of the plant has the seeds.
  Ans- Fruit

(d) Example of a seed with single cotyledon.
  Ans- Wheat

 (e) Example of seed with two cotyledons.
  Ans- Gram
 Section B
 State a point of difference between the following:

(a) Seed of a maize and Seat of a gram
Seed of a maize
Seed of a gram
Seed of maize has one cotyledon.
Seed of gram has two cotyledons.


(a) Function of leaf and Function of a flower
Function of leaf
Function of a flower
Function of leaf is to make food for the plant.
Function of a flower is to help plant in reproduction.

 Match the plant to its seed


 Correct the following incorrect statements.

 Food for the plant is made in the fruit.
 Food for the plant is made in the leaves.

 Flower supports the plant.
 Stem supports the plant.

 Gram seed is an example of seed with single cotyledon.
 Gram seed is an example of seed with two cotyledon.

 We must not care for indoor plants.
 We must care for indoor plants.

Section C
Bonsai plants  look beautiful. Carefully observe the one shown in the picture given below and then answer the questions that follow.

Q. Name the different parts of the plant that can be observed.
Ans-  Different parts of the plant that can be observed are:
1-   Trunk
2-   Branches
3-   Leaves
4-   Aerial Roots

 Q. Are the parts of this bonsai similar to any plant?  yes/ no
Ans- Yes, the parts of this bonsai are similar to a fully grown banyan tree.

Q. This plant is much shorter than other plants. Do you agree?   Yes /  no
Ans- Yes

Q. Do you think, certain parts of a bonsai plant are missing, hence it is shorter?  Justify your answer.
Ans- None of the part is missing in this bonsai plant. It is shorter because all its parts are shorter.

Section D
Q. How is the function of a root different from that of a stem?
Ans- Root anchors the plant into the soil while the stem provides support to the plant.

Q. Sequence the steps of germination of a seed.
  • Seedling grows into a young plant.
  • The seedlings develops roots that grow downwards and shoot that grows upwards.
  • Cotyledons then shrink and disappear.
  • Seeds absorb water from soil.
  • The seedling gets air and light, seed coat opens, and the seedling comes out.
Ans- Correct sequence the steps of germination of a seed
  • Seeds absorb water from soil.
  • The seedling gets air and light, seed coat opens, and the seedling comes out.
  • The seedlings develops roots that grow downwards and shoot that grows upwards.
  • Cotyledons then shrink and disappear.
  • Seedling grows into a young plant.

Section E
(Revision Questions)

Q. What is the function of leaves?
Ans- Leaves make food for the plant.

Q. What is the function of fruit?
Ans- Fruit contains seed for germination of new plant.

Q. What are the different parts of the seed?
Ans- Following are the different parts of the seed:
1-   Seed coat
2-   Embryo
3-   Food store

Q. What is germination?
Ans- The growth of a seed into a young plant or a seedling is called germination.

Q. What are the conditions required for the germination of seed?
Ans- Following are the conditions required for the germination of seed:
1-   Water
2-   Warmth
3-   Air
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