CBSE Class 6 Science Chapter 7 Notes Getting to Know Plants
Getting to Know Plants Class 6 Notes Understanding the Lesson
1. Plants are living things, they grow in soil and remain fixed at a place with the help of roots.
2. Plant do not take food like animals but they make their own food by the process of photosynthesis.
3. Plants are of different shapes and sizes.
4. Most of the plants can be classified into three groups: herbs, shrubs and trees on the basis of certain characteristics.
5. Herbs are small plants having a soft and delicate stem. They have a very short life span. For example, tomato, grass, coriander, etc.
6. Shrubs are medium-sized plants with a hard and woody stem. They are bigger than herbs but smaller than trees.
7. The life span of shrubs is many years but it is less than that of trees. For example, tulsi, lemon, etc.
8. Trees are tall and big plants with a hard and thick woody stem called trunk. Branches in a tree appear higher upon the stem. For example, neem, mango, etc.
9. Shrubs and trees are both woody plants.
10. Climbers are plants having thin, long and weak stem which cannot stand upright but readily climbs up a neighbouring support. It has special organs called tendrils for climbing. For example, pea plant, bitter gourd, etc.
11. A plant having thin, long and weak stem which cannot stand upright and spreads on the ground is called a It grow along the ground or other surfaces by extending long shoots. For example, strawberry plant, money plant, etc.
12. Root is that part of plant which is below the ground (in the soil).
13. Roots are mainly of two types:
(i) Taproots
(ii) Fibrous roots
14. Taproot have a main root originated from the base of the stem. It has many smaller roots, called lateral roots, attached to the main root.
15. Fibrous root do not have any main root and all roots seem similar.
16. The stem is the part of the plant which rises vertically up from the ground. Stems of most of the plants are quite strong and can stand erect on their own.
17. The thick main stem of the tree is known as Most of the tree trunks are covered with a tough layer called ‘bark’.
18. The stem carries the prepared food from the leaves to other parts of the plants.
19. A leaf is thin, broad, flat and green part of a plant which is attached to the stem. It has tiny pores called stomata.
20. A leaf mainly consists of two parts-lamina and petiole.
21. The leaf contains a green coloured pigment called
22. Two kinds of venation is found on leaves:
(i) Reticulate venation
(ii) Parallel venation
23. Plants having leaves with reticulate venation have taproots while plants having leaves with parallel venation have fibrous roots.
24. are the most beautiful part of a plant. They vary in size, shape and colour.
25. The flower contains the reproductive organ.
26. Different parts of flower are pedicel, sepals, petals, stamens, carpel.
27. A fruit is that part of a plant that contains seeds. For example, apple, orange, etc.
Class 6 Science Chapter 6 Notes Important Terms
Climbers: A plant having thin, long and weak stem which cannot stand upright but, readily climbs up a neighbouring support (like a fence) or a tree is called a climber.
Conduct: To carry a substance from one place to other is called conduct.
Creeper: A plant having thin, long and weak stem which cannot stand upright and spreads on the ground is called a creeper.
Fibrous root: Some plants do not have a main root. They have a bunch of similar roots called fibrous roots.
Herbs: Herbs are small plants having a soft and delicate stem.
Lamina: The broad green part of the leaf is called lamina.
Lateral roots: Smaller roots which arise from main roots in the taproot system are called the lateral roots.
Midrib: The thick vein in the middle of the leaf is called the midrib.
Ovules: Small bead-like structures attached in the inner wall of the ovary are called ovules.
Parallel venation: In the leaves of grass, veins are parallel to one another. This is called parallel venation.
Petals: Petals are variously coloured leaf-like structures present in the flowers.
Petiole: The part of leaf by which it is attached to the stem is called petioles.
Photosynthesis: A process by which green plants make their food from sunlight, carbon dioxide and water is called photosynthesis.
Pistil: The innermost, female reproductive part of a flower is called pistil.
Reticulate venation: When veins and veinlets form a net like design in both sides of midrib, the venation is called reticulate venation.
Sepal: Sepal is the outer green part which protect the inner parts of flower when it is a bud.
Shrubs: Shrubs are medium-sized plants with a hard and woody stem branching out near the base.
Stamen: Stamen is the male reproductive part of a flower.
Taproot: The root system in which a single root arises from the base of the stem, with secondary and tertiary branches is called taproot system.
Transpiration: The loss of water in the form of vapours from the stomata in leaves is called transpiration.
Trees: Trees are tall and big plants with a hard and thick woody stem.
Veins: Threadlike structures in leaf are called veins.