Class 4 Science Chapter 1 Plant Life

Class 4 Science Chapter 1: Plant Life – Quick Revision

Class 4 Science Chapter 1: Plant Life introduces the main parts of a plant and explains how roots, stems, leaves, flowers, fruits and seeds help a plant live, grow and reproduce.

Updated for 2026–27: schools around the world may use different books and chapter numbers, so this page is written as a board-neutral learning guide. Students can use it for the core science concepts while following their own school textbook for the exact chapter sequence.

Plant part	Main function
Roots	Anchor the plant and absorb water and minerals; some also store food.
Stem	Supports leaves and flowers and transports water, minerals and food.
Leaves	Make food by photosynthesis and exchange gases through stomata.
Flowers	Help flowering plants reproduce by producing seeds after pollination and fertilisation.
Fruits	Protect seeds and often help in seed dispersal.
Seeds	Contain a young plant (embryo) and can grow into a new plant under suitable conditions.

Watch & Learn: English + Hindi Video Lessons

English: Parts of Plants and Their Functions

This visual lesson explains roots, stems, leaves, flowers and seeds in simple language and is suitable for primary-school learners from different curricula.

हिंदी: पौधे के भाग – जड़, तना, पत्ती, फूल और फल

यह हिंदी पाठ पौधे के मुख्य भागों—जड़, तना, पत्ती, फूल और फल—और उनके कार्यों को सरल तरीके से समझाता है। यह प्राथमिक कक्षाओं के विद्यार्थियों के लिए उपयोगी दृश्य पुनरावृत्ति है।

Plants are essential to life on Earth. They form the base of many food chains, release oxygen during photosynthesis and provide habitats for countless organisms. Plants grow in many environments, including forests, grasslands, deserts, mountains, freshwater habitats and even coastal or marine environments. Most flowering plants begin life from seeds, which need suitable conditions such as water, air and the right temperature to germinate.

Parts of Plants

Roots

Roots usually grow into the soil and help anchor the plant. Tiny root hairs increase the surface area for absorbing water and dissolved mineral nutrients. Some roots, such as carrot, radish and sweet potato, are specially adapted to store food.

Function of roots

Roots anchor the plant firmly in the ground and provide support.
Root hairs absorb water and dissolved minerals from the soil.
Some roots, such as carrots and radishes, store food.
Roots help hold soil particles together and can reduce soil erosion.

Stem

The stem supports leaves, buds, flowers and fruits. It also acts as a transport pathway: xylem carries water and minerals upward from the roots, while phloem carries sugars made in the leaves to other parts of the plant. Trees such as mango and neem have thick woody stems called trunks. Climbers and creepers have weaker stems and depend on support or spread along the ground.

Stem Functions

Stems support leaves, branches, buds, flowers and fruits.
They transport water and minerals from the roots and distribute sugars made by the leaves.
Some stems store food. Potato is a modified underground stem (a tuber), ginger is an underground stem called a rhizome, and sugarcane stores sugar in its above-ground stem.

Leaves

Leaves come in many shapes and sizes. The broad flat part is called the leaf blade or lamina, and veins carry water and food through the leaf. Tiny pores called stomata allow gases and water vapour to move in and out. Many leaves also have a waxy outer layer that helps reduce water loss.

Function of Leaves

Green leaves make food by photosynthesis. Chlorophyll captures light energy, and the plant uses carbon dioxide and water to make sugar.
Oxygen is released as a by-product of photosynthesis and is important for the respiration of humans and many other organisms.
Leaves also lose water vapour through stomata in a process called transpiration.
Some leaves are eaten as food, such as spinach, cabbage and lettuce.

Word equation: Carbon dioxide + Water → Glucose + Oxygen (in the presence of light and chlorophyll)

Flowers

Flowers are the reproductive structures of flowering plants. After pollination and fertilisation, the ovary of a flower can develop into a fruit while the ovules develop into seeds. Not every flower produces a fruit, because successful pollination and fertilisation are required. Some fruits such as mango usually contain one large seed, while papaya and watermelon contain many seeds.

Uses of Flowers

Rose, jasmine and other fragrant flowers are used in perfumes and scented products.
Some flower parts are eaten; broccoli and cauliflower are examples of edible flower structures.
Saffron comes from the stigma of the crocus flower, while cloves are dried flower buds.
Flowers are widely used for decoration, bouquets, garlands and cultural celebrations.

Fruits and Seeds

Fruits protect seeds while they develop. Seeds contain a tiny young plant called an embryo, a food store and a protective seed coat. When conditions are suitable, a seed begins to grow; this process is called germination.

5-Minute Plant Activity

Choose a safe flowering plant at home, school or in a garden.
Identify the root system if visible, stem, leaves, flowers and any fruits or seeds.
Look closely at a leaf and find the blade, veins and stalk.
Explain aloud what each plant part does.
Draw and label the plant using the six terms: root, stem, leaf, flower, fruit and seed.

Class 4 Plants Life FAQs

What are the main parts of a plant?

The main parts commonly studied at this level are roots, stems, leaves, flowers, fruits and seeds. Each part performs a different job that helps the plant survive or reproduce.