3rd Grade ICSE

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Answer key

Chapter: 05. Plants In The Surroundings

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Section A: Multiple Choice Questions (8 Marks)

(Choose the best answer and tick the correct option.)

Which part of the plant usually grows under the soil? a) Flower b) Stem c) Root d) Leaf

Which of these plants has a fibrous root system? a) Carrot b) Turnip c) Rice d) Mango

What is the main function of the stem in a plant? a) Making food b) Absorbing water c) Supporting the plant d) Protecting seeds

Leaves have tiny pores called what, which help the plant to breathe? a) Veins b) Chlorophyll c) Lamina d) Stomata

What do plants release into the air during photosynthesis? a) Carbon dioxide b) Oxygen c) Water d) Sugar

Which part of the plant often changes into a fruit? a) Root b) Stem c) Flower d) Leaf

What is the hard outer covering of a seed called? a) Cotyledon b) Embryo c) Seed coat d) Plumule

For a seed to germinate, it needs warmth, water, and what else? a) Soil b) Sunlight c) Air d) Fertiliser

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Section B: Fill in the Blanks (8 Marks)

(Complete the sentences with the correct word.)

All animals, including human beings, depend on plants for food, fibres, wood, medicines and many other _ _ _ _ _ _ _ _ _ _ _ _ _ _ _of life.

The root system grows _ _ _ _ _ _ _ _ _ _ _ _ _ _ _from sunlight.

Plants with weak stems that creep along the ground are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

The green-coloured pigment in leaves that traps sunlight is called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Many _ _ _ _ _ _ _ _ _ _ _ _ _ _ _are edible and protect the seeds inside.

The baby plant inside the seed is called the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

The process by which a seed grows into a young plant is known as _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

We should _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ out the unwanted plants from our garden on a regular basis.

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Section C: True/False (6 Marks)

(Read each statement and write True or False.)

Elephants have horns, just like cows and deer.

All stems grow above the ground.

Leaves also help in the upward movement of water from the roots.

All fruits contain many seeds.

Seeds with only one cotyledon are called dicot seeds.

Watering plants only once a month is good for all types of plants.

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Section D: Explanation of Terms (6 Marks)

(Explain the following terms in one sentence each.)

Photosynthesis

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Germination

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Trunk

____________________________________________________________________________________________________________

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Section E: Short Answer Questions (12 Marks)

(Answer the following questions in 2-3 sentences each.)

Name two functions of the roots other than anchoring the plant.

____________________________________________________________________________________________________________

How do climbers differ from creepers? Give one example of each.

____________________________________________________________________________________________________________

What is the main purpose of the cotyledons in a seed?

____________________________________________________________________________________________________________

Why is it important to add compost or manure to plants every few months?

____________________________________________________________________________________________________________

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Section F: Diagram-Based Questions (5 Marks)

Observe the diagram of the plant parts below and answer the questions.

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a. Label parts A, B, C, and D in the diagram. b. Which labeled part (A, B, C, or D) is responsible for preparing food for the plant?

____________________________________________________________________________________________________________

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Section G: Long Answer Questions (5 Marks)

Explain how the leaves of a plant are essential for all living organisms on Earth.

____________________________________________________________________________________________________________

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