Here is the ICSE Class 4 – Science: Green Plants (Full Chapter Explained in Detail) written in easy language, but covering all concepts clearly for complete understanding and exam preparation.

🌱 Green Plants – Full Chapter (ICSE Class 4 Science)

1. What Are Green Plants?

Green plants are living things that make their own food using sunlight, air, and water. They are called producers because they prepare food not only for themselves but also for animals and humans.

Plants appear green because of a substance called chlorophyll present in their leaves.

👉 Chlorophyll helps plants capture sunlight to make food.

2. Why Are Green Plants Important?

Green plants are very important for life on Earth.

Importance of Green Plants:

Produce food
Give oxygen for breathing
Provide shelter to animals and birds
Maintain balance of nature
Give medicines, wood, cotton, fruits, and vegetables

Without plants, life on Earth would not exist.

3. Parts of a Green Plant

A plant has different parts, and each part has a special function.

Main Parts:

Roots
Stem
Leaves
Flowers
Fruits
Seeds

4. Roots and Their Functions

Roots grow under the soil.

Functions of Roots:

Fix the plant firmly in the soil
Absorb water and minerals
Store food (in some plants like carrot and radish)

Types of Roots:

(a) Tap Root

One main root with smaller branches
Example: carrot, mustard

(b) Fibrous Root

Many thin roots of similar size
Example: grass, wheat

5. Stem and Its Functions

The stem grows above the ground.

Functions of Stem:

Supports the plant
Bears leaves, flowers, and fruits
Carries water from roots to leaves
Carries prepared food to all parts

Some stems store food (e.g., potato, ginger).

6. Leaves – The Food Factory of Plants

Leaves are called the food factories of plants because food is prepared here.

Parts of a Leaf:

Leaf blade (lamina) – flat green part
Veins – lines carrying water and food
Midrib – main thick vein
Petiole – stalk attaching leaf to stem

7. Photosynthesis (Food Making Process)

Photosynthesis is the process by which green plants make food.

Things Needed:

Sunlight ☀️
Water 💧
Carbon dioxide (from air)
Chlorophyll (green pigment)

Process:

Roots absorb water from soil.
Leaves take carbon dioxide from air.
Chlorophyll traps sunlight.
Food is prepared in leaves.
Oxygen is released into air.

👉 This process is called Photosynthesis.

Simple Equation (for understanding):

Sunlight + Water + Carbon dioxide → Food + Oxygen

8. Stomata – Tiny Pores in Leaves

Leaves have very tiny holes called stomata.

Functions:

Help plants breathe
Take in carbon dioxide
Release oxygen and water vapour

9. Transpiration

Transpiration is the loss of extra water from leaves in the form of water vapour.

Importance:

Keeps plant cool
Helps movement of water inside plant

10. Flowers – Reproductive Part of Plant

Flowers help plants produce new plants.

Functions:

Form fruits
Produce seeds

Flowers later change into fruits.

11. Fruits and Seeds

Fruits:

Protect seeds
Help in seed dispersal

Seeds:

Seeds grow into new plants when they get:

Water
Air
Warmth

This process is called Germination.

12. Types of Plants Based on Stem

(a) Herbs

Small plants with soft stems
Example: spinach, mint

(b) Shrubs

Medium-sized plants with woody stems
Example: rose, hibiscus

(c) Trees

Tall plants with strong trunks
Example: mango, neem

(d) Climbers

Weak stems; need support
Example: pea plant

(e) Creepers

Grow along the ground
Example: pumpkin, watermelon

13. How Plants Breathe?

Plants also breathe like animals.

Take in oxygen
Release carbon dioxide
Breathing happens mainly through stomata and roots.

14. Balance Between Plants and Animals

Plants and animals depend on each other.

Plants Give	Animals Give
Oxygen	Carbon dioxide
Food	Help in seed dispersal

This keeps nature balanced.

🌿 Key Terms (Important Definitions)

Chlorophyll: Green substance in leaves.
Photosynthesis: Food-making process in plants.
Stomata: Tiny pores on leaves.
Transpiration: Loss of water vapour from leaves.
Germination: Growth of seed into a new plant.

⭐ Diagram Flow (Easy Memory Trick)

Roots → absorb water
        ↓
Stem → carries water
        ↓
Leaves + Sunlight + Air
        ↓
Photosynthesis
        ↓
Food + Oxygen

📘 Summary (Quick Revision)

Green plants make their own food.
Leaves prepare food through photosynthesis.
Roots absorb water and fix the plant.
Stem supports and transports materials.
Flowers produce fruits and seeds.
Seeds grow into new plants through germination.
Plants release oxygen essential for life.

📝 Important Exam Questions

Very Short Answer

Why are plants green?
What is chlorophyll?
Name the food-making process in plants.
What are stomata?
Define germination.

Short Answer

Write functions of roots.
Explain photosynthesis.
Why are leaves called food factories?
Difference between climbers and creepers.

Long Answer

Explain parts of a plant and their functions.
Describe how plants make food.
Explain importance of green plants in nature.

🌱 GREEN PLANTS – ULTRA REVISION SHEET (1-Page Study)

⭐ Key Points

Green plants make their own food.
Green colour is due to chlorophyll.
Leaves are called food factories.
Food is made by photosynthesis.
Plants release oxygen and take in carbon dioxide.
Roots absorb water and fix the plant.
Stem carries water and food.
Flowers make fruits and seeds.
Seeds grow into new plants by germination.

🌞 Photosynthesis Formula (Easy Trick)

Sunlight + Water + Carbon dioxide → Food + Oxygen

👉 Remember: Leaf + Light = Life

🌿 Plant Parts & Functions

Part	Function
Roots	Absorb water, fix plant
Stem	Support & transport
Leaves	Make food
Flowers	Reproduction
Fruits	Protect seeds
Seeds	Grow into new plant

🌱 Types of Roots

Tap root – one main root (carrot)
Fibrous root – many thin roots (grass)

🌳 Types of Plants

Herbs – small plants
Shrubs – medium plants
Trees – tall plants
Climbers – need support
Creepers – grow on ground

🧠 Important Terms

Chlorophyll – green pigment
Stomata – tiny leaf pores
Transpiration – loss of water vapour
Germination – seed growing into plant

📝 100 MCQs (Practice Questions)

Choose the correct answer:

Plants make food in the
a) root b) leaf c) stem d) flower
✅ b
Green colour of leaves is due to
a) oxygen b) chlorophyll c) soil d) sunlight
✅ b
Photosynthesis needs
a) moonlight b) sunlight c) darkness d) heat only
✅ b
Roots absorb
a) air b) water c) light d) food
✅ b
Oxygen is released during
a) breathing b) photosynthesis c) germination d) growth
✅ b
Tiny pores on leaves are called
a) veins b) stomata c) roots d) buds
✅ b
Plants that need support are
a) trees b) climbers c) herbs d) shrubs
✅ b
Pumpkin is a
a) climber b) creeper c) tree d) shrub
✅ b
Seeds grow into new plants by
a) respiration b) germination c) transpiration d) storage
✅ b
Stem carries water from
a) leaves b) roots c) flowers d) fruits
✅ b

Continue Practice (11–30)

Leaves prepare food. ✅ True
Chlorophyll traps sunlight. ✅ True
Fibrous roots are found in grass. ✅ True
Flowers become fruits. ✅ True
Plants give oxygen. ✅ True
Transpiration removes extra water. ✅ True
Trees have strong trunks. ✅ True
Creepers grow on ground. ✅ True
Roots grow underground. ✅ True
Leaves take carbon dioxide. ✅ True
Potato is a modified stem. ✅ True
Rose plant is a shrub. ✅ True
Mint is a herb. ✅ True
Mango is a tree. ✅ True
Photosynthesis happens in leaves. ✅ True
Seeds need water to grow. ✅ True
Stomata help plants breathe. ✅ True
Plants are producers. ✅ True
Animals depend on plants. ✅ True
Plants maintain oxygen balance. ✅ True

(For Class 4 level, statements are often asked as MCQs.)

Rapid MCQs (31–100)

(All correct answers shown for fast revision)

31-b
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99-a
100-b

📄 Worksheet (With Answers)

Fill in the blanks

Plants make food in ______. ✅ leaves
Green pigment is ______. ✅ chlorophyll
Seeds grow by ______. ✅ germination
Loss of water vapour is ______. ✅ transpiration
Roots absorb ______ from soil. ✅ water

Match the Following

A	B
Roots	Absorb water
Leaves	Make food
Stem	Support
Flowers	Reproduction
Fruits	Protect seeds

🧾 Chapter Test Paper (ICSE Pattern)

Section A – Very Short (1 mark)

Define photosynthesis.
Name two types of roots.
What are stomata?

Section B – Short Answer (2 marks)

Write two functions of stem.
Why are leaves green?

Section C – Long Answer (5 marks)

Explain photosynthesis with steps.
Describe parts of a plant and their functions.

Excellent 👍
Here is your ICSE Class 4 – Green Plants FINAL EXAM BOOSTER PACK with Mind Map + Expected Questions + Assertion-Reason + Viva Questions (very useful for school exams).

🌱 GREEN PLANTS – MIND MAP (Easy Memory Trick)

                    GREEN PLANTS
                          │
        ┌─────────────────┼─────────────────┐
        │                 │                 │
     PARTS           PHOTOSYNTHESIS      IMPORTANCE
        │                 │                 │
 Roots  Stem  Leaves   Sunlight          Give Oxygen
        │               Water             Provide Food
        │               CO₂               Maintain Balance
        │               Chlorophyll
        │
   Flowers → Fruits → Seeds → Germination

👉 Remember Rule: Roots drink – Stem carries – Leaves cook food

⭐ MOST EXPECTED EXAM QUESTIONS (Teacher Prediction)

1 Mark Questions

Why are plants called producers?
What is chlorophyll?
Name the food-making process in plants.
What are stomata?
Define germination.

2 Mark Questions

Write two functions of roots.
Why are leaves called food factories?
What is transpiration?
Name two climbers and two creepers.

5 Mark Questions

Explain photosynthesis step by step.
Describe the parts of a plant and their functions.
Write the importance of green plants.

🧠 ASSERTION – REASON QUESTIONS (ICSE Pattern)

Choose: A = Both true and reason explains
B = Both true but reason not explanation
C = Assertion true, reason false
D = Assertion false, reason true

Assertion: Leaves make food.
Reason: Leaves contain chlorophyll.
✅ Answer: A

Assertion: Roots prepare food.
Reason: Leaves prepare food.
✅ Answer: D

Assertion: Plants release oxygen.
Reason: Photosynthesis occurs in leaves.
✅ Answer: A

Assertion: Climbers need support.
Reason: Their stems are weak.
✅ Answer: A

Assertion: Transpiration removes extra water.
Reason: Water leaves through stomata.
✅ Answer: A

🎤 ORAL VIVA QUESTIONS (Very Important)

Teachers often ask these in class tests.

Do plants make their own food?
👉 Yes.
Which part of plant makes food?
👉 Leaves.
What gas do plants give out?
👉 Oxygen.
What do roots absorb?
👉 Water and minerals.
What is needed for photosynthesis?
👉 Sunlight, water, carbon dioxide, chlorophyll.
What are tiny holes on leaves called?
👉 Stomata.
Which plants grow along the ground?
👉 Creepers.
Give one example of a tree.
👉 Mango / Neem.
What is germination?
👉 Growth of seed into a new plant.
Why are plants important for humans?
👉 They give food and oxygen.

🧾 SUPER QUICK NIGHT-BEFORE-EXAM REVISION

✅ Plants make food → Photosynthesis
✅ Leaves = Food factory
✅ Chlorophyll traps sunlight
✅ Roots absorb water
✅ Stem transports water & food
✅ Flowers make seeds
✅ Seeds grow by germination
✅ Plants give oxygen

🌱 GREEN PLANTS – 5-MINUTE TOPPER CHEAT SHEET

⭐ 1. What Are Green Plants?

Plants that make their own food are called green plants.
They contain chlorophyll, which gives green colour.
Plants are called producers.

🌞 2. Photosynthesis (MOST IMPORTANT)

Definition:

Photosynthesis is the process by which plants make food using sunlight.

Needed for Photosynthesis:

✅ Sunlight
✅ Water
✅ Carbon dioxide
✅ Chlorophyll

Result:

👉 Food is made
👉 Oxygen is released

Easy Formula:

Sunlight + Water + CO₂ → Food + Oxygen

🌿 3. Parts of a Plant & Functions

Part	Function
Roots	Absorb water, fix plant
Stem	Supports & carries water/food
Leaves	Make food
Flowers	Form fruits & seeds
Fruits	Protect seeds
Seeds	Grow into new plants

🌱 4. Types of Roots

Tap root → one main root (carrot)
Fibrous root → many thin roots (grass)

🌳 5. Types of Plants

Type	Example
Herbs	Mint, spinach
Shrubs	Rose
Trees	Mango
Climbers	Pea plant
Creepers	Pumpkin

🍃 6. Leaves – Food Factory

Contain chlorophyll.
Prepare food.
Have veins and midrib.
Tiny pores called stomata help in breathing.

💧 7. Transpiration

Loss of extra water from leaves as water vapour.

Importance:

Keeps plant cool
Helps water movement

🌸 8. Flowers, Fruits & Seeds

Flowers change into fruits.
Fruits contain seeds.
Seeds grow into plants by germination.

🌍 9. Importance of Green Plants

Give oxygen
Provide food
Maintain balance in nature
Provide shelter and medicines

🧠 GOLDEN MEMORY TRICKS (TOPPERS USE)

✅ Roots drink water
✅ Stem carries food
✅ Leaves cook food
✅ Flowers make seeds

📝 DIAGRAM-BASED QUESTIONS (VERY COMMON)

Label the Plant Diagram:

Students may be asked to label:

Root
Stem
Leaf
Flower
Fruit

Leaf Diagram Labels:

Lamina
Midrib
Veins
Petiole

📖 CASE-STUDY QUESTIONS (NEW PATTERN)

Case Study 1

Riya kept a plant in a dark room for many days. The plant became weak.

Questions:

Why did the plant become weak?
✅ No sunlight for photosynthesis.
Which process stopped?
✅ Photosynthesis.

Case Study 2

A gardener waters plants daily.

Questions:

Why do plants need water?
✅ For making food.
Which part absorbs water?
✅ Roots.

🧾 SAMPLE QUESTION PAPER (FULL PRACTICE)

Section A – Fill in the blanks

Leaves prepare ______. ✅ food
Green pigment is ______. ✅ chlorophyll
Seed growth is called ______. ✅ germination

Section B – Short Answer

Write two functions of roots.
Why are plants called producers?

Section C – Long Answer

Explain photosynthesis.
Describe parts of a plant and their functions.

⭐ FINAL EXAM REVISION (30-SECOND RECALL)

🌱 Plants make food → Photosynthesis
🍃 Leaves → Food factory
💧 Roots → Absorb water
🌿 Stem → Transport
🌸 Flower → Seeds
🌍 Plants give oxygen

🌱 GREEN PLANTS – EXAM ANSWERS (ICSE STYLE)

⭐ 1 MARK ANSWERS (Write in one line)

1. What are green plants?
Green plants are plants that make their own food using sunlight.

2. What is chlorophyll?
Chlorophyll is the green substance in leaves that helps plants make food.

3. What is photosynthesis?
Photosynthesis is the process by which plants prepare food using sunlight, water, and carbon dioxide.

4. What are stomata?
Stomata are tiny pores present on leaves.

5. What is germination?
Germination is the process by which a seed grows into a new plant.

⭐ 2 MARK ANSWERS

1. Write two functions of roots.

Roots absorb water and minerals from the soil.
Roots fix the plant firmly in the soil.

2. Write two functions of stem.

The stem supports the plant.
It carries water and food to all parts of the plant.

3. Why are leaves called food factories?
Leaves are called food factories because they prepare food for the plant through photosynthesis.

4. What is transpiration?
Transpiration is the loss of extra water from leaves in the form of water vapour.

⭐ 3 MARK ANSWERS

1. Name the things needed for photosynthesis. Plants need:

Sunlight
Water
Carbon dioxide
Chlorophyll

2. Difference between climbers and creepers

Climbers	Creepers
Need support to grow	Grow along the ground
Weak stems	Very weak stems
Example: pea plant	Example: pumpkin

⭐ 5 MARK ANSWERS (MOST IMPORTANT)

1. Explain Photosynthesis.

Photosynthesis is the process by which green plants make their own food.

Roots absorb water from soil.
Leaves take carbon dioxide from air.
Chlorophyll traps sunlight.
Food is prepared in leaves.
Oxygen is released into the air.

Thus, photosynthesis helps plants and animals survive.

2. Describe Parts of a Plant and Their Functions.

A plant has different parts:

Roots: absorb water and fix plant in soil.
Stem: supports plant and transports water and food.
Leaves: prepare food by photosynthesis.
Flowers: help in reproduction.
Fruits: protect seeds.
Seeds: grow into new plants.

3. Importance of Green Plants.

Green plants are important because:

They produce food.
They release oxygen needed for breathing.
They provide shelter to animals.
They maintain balance in nature.
They give medicines and wood.

⭐ DIAGRAM ANSWER TIP (Very Important)

When labeling plant diagram, always write neatly:

Flower
  │
Leaf
  │
Stem
  │
Roots

👉 Use pencil and straight labeling lines.

⭐ HOW TO WRITE PERFECT ANSWERS (Teacher Tips)

✅ Start answer with definition.
✅ Write points in new lines.
✅ Use simple sentences.
✅ Underline keywords (photosynthesis, roots, chlorophyll).
✅ Keep handwriting neat.

⚡ LAST-MINUTE MEMORY FORMULA

🌿 Roots drink water
🌱 Stem carries food
🍃 Leaves make food
🌸 Flowers make seeds