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Chapter: 4th Science : Term 2 Unit 3 : Plants

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4th Science : Term 2 Unit 3 : Plants : Text Book Back Exercises Questions with Answers, Solution, Evaluation; Choose the correct answer, Fill in the blanks, Say True or False, Match the following, Short Answers, Answer briefly, Answer in detail, Questions based on higher order thinking, Student Activities, Student Project

Plants ( Term 2 Chapter 3 | 4th Science)



I. Choose the correct answer.


1. The tip of the leaf is

a. blade

b. apex

c. midrib

d. veins

Answer: b. apex


2. Which one of the following is a primary producer?

a. Plant

b. Animal

c. Human

d. None of the above

Answer: a. Plant


3. Which flower blooms during winter?

a. Jasmine

b. Tulip

c. December

d. Fire cracker

Answer: c. December


4. Choose the ornamental plant from the list.

a. Parthenium

b. Mango

c. Travellars palm

d. Groundnut

Answer: c. Travellars palm


5. Which plant flower is edible?

a. Cauliflower

b. Potato

c. Mint

d. Cabbage

Answer: a. Cauliflower


II. Fill in the blanks.

1. During photosynthesis food is produced and stored in the leaf.

2. Green plants have chlorophyll pigment.

3. Onion is a stem part of a Plant.

4. The male part of the flower is stamen.

5. An example for edible seed is rice.


III. Answer the following in one or two words.

1. Which is the female part of the plant?

Pistil is the female part of the plant.

2. Write the name of any one of the leaf that is used as a food.

Coriander, Cabbage

3. Which flower bud is used as spices in food?


4. What are the nutrients present in the seeds?

Carbohydrates and proteins.

5. Write any one of the flower that blooms in summer.



IV. Answer briefly.

1. Write the parts of the leaf.


• Apex

• Midrib


• Petiole

• Stomata

2. Define – Photosynthesis.

Photosynthesis is a process by which plants make their food using chlorophyll, water, carbon dioxide in the presence of sunlight.

3. Write the names of the exotic plants.

i) Sago palm (Cycas)

ii) Fern

iii) Crotons

iv) Travellers palm

v) Boat lily

vi) Aloevera

4. Write the names of any two underground stem plant.

Potato, Onion and Ginger

5. Why should we not touch parthenium plant?

The pollen of this plant is allergic in nature. So we should not touch parthenium plant.


V. Answer in detail.

1. Mark any four parts and describe the parts of a leaf.

Blade: The broad flat part of the leaf (Lamina)

Apex: The tip of the leaf.

Midrib: The midrib runs along the centre of the leaf.

Veins: Veins are hollow tubes that branch out from the midrib.

Petiole: This part joins the leaf to the main stem.

2. Draw a diagram of a flower and explain the parts of a flower .

Sepal : Sepals are leaves that protect the flower while it is still a bud. Sepals are usually green in colour.

Petal : Petals are often bright coloured. Their main job is to attract insects such as bees or butterflies, to the flower.

Stamen : Stamen can be seen at the centre of a flower.

They contain pollengrains that help the plants to multiply. It is the male part of a flower.

Pistil : Pistil is also seen at the centre of the flower.

The pistil uses the pollen to help the flower become the fruit. It is the female part of a flower.


VI. Project.

1. Collect the edible parts of different plants used in your home and display them in your class room.

2. Collect some flowers and discuss with your friends about the parts of flower.

Think and answer

 Which part of the leaf collects carbon dioxide?

Answer: Small pores in the leaves (Stomata)

• Which part of the leaf transports water?

Answer: Veins

Think and answer

Why would living things not be able to live without plants?

Answer: Only plants can produce food on their own. They are primary producers. All living things depend on plants for food. So they cannot live without plants.

Try to Answer

Fill in the blanks by rearranging the letters in the bracket.

1. During photosynthesis plants releases oxygen (egxyno).

2. Plant is a primary producer (tanpl).

3. Stomata are seen in the lower (owler) surface of the leaf.

4. Pigment involved in the food synthesis is chlorophyll (phllylochor).

Let us do

Take two potted plants. Keep one in sunlight and other in a fully covered box. Water them regularly. After a week observe the plants.

Let us do

List out the flowering and Non-flowering plants in your surrounding.

Flowering plants : Rose, Drumstick, Brinjal

Non-flowering plants : Conifers, Fungi, Ferns

Let us do

List out the places where you see the non-green plants

1. Near dead and decaying plants.

2. Fallen logs.

Try to Answer

Fill in the blanks.

1. Algae is an example for non flowering plant.

2. Plants are classified based on pigment and flower of the plant.

3. Heterotrophs depend on other organism to live and get their food.

4. Autotrophs use carbon dioxidesunlight and chlorophyll to prepare their own food.

Have you seen flowers? Try to answer the questions given below

a) Which is your favourite flower? Paneer rose

b) What is the colour of the flower? Light pink

c) How does it smell? Paneer smell

Try to Answer

Fill in the blanks.

1. Sepals protect the flower while it is still a bud.

2. Stamen contains pollen grains.

3. Pistil is the female part of a flower.

Let us do

Bring few hibiscus flowers to the classroom. Distribute the flowers to children. Introduce the parts of the flower to them. Then, ask them to observe and feel the different parts of the flower and tell them to record their observation.

Petal: bright red ; Sepal: green ; Pistil: light red ; Stamen: yellow

More to know

Firecracker flowers bloom in all seasons

Kurinji flower blooms once in 12 years

Think and answer: Can you name the four seasons?

Answer: Summer,  Spring, Autumn, Winter

Try to Answer

1. Find the odd one.

i. December, Tuberose, Tulip.

ii. Saffron, Dahlia, Rose.

iii. Rose, Boat lily, Crotons.

N.B : i) December and Tuberose bloom in winter.

ii) Saffron and Dahlia bloom in autumn.

iii) Boat lily and Crotons are exotic plants.

Let us do

Collect various ornamental plants and plant in your school garden or at home.

Try to Answer

Fill in the blanks.

1. Cauli flower is used as food.

2. Stem part of the potato plant is used as food.

3. Stem of the onion / ginger stores food in it.

4. Seeds are rich in carbohydrates and proteins.

Let us do

Complete the table to show which parts of the plant we eat.

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