Velammal Bodhi Campus, Kolapakkam, Chennai-128
(A CBSE-IIT/NEET Integrated Senior Sec. School)
Std:IV Ln-2 Senses of touch and smell Sub:- EVS
NOTES
GENERAL INSTRUCTIONS
Use double side single ruled (120 pages ) note book for EVS CW
Use good blue and black ink or gel pen.
For headings and questions use black ink or gel pen.
For answers use blue pen.
Leave space between each words .
Write one roman letter per day .
Leave a line between each Question.
Write legibly with neat handwriting .
Use pencil for diagram.
LESSON:4 – ROOTS AND FLOWERS
I.Mind map
Flowers
Annuals Biennials Perennial Seasonal
Flowers Flowers Flowers Flowers
II. Dictation words:
1.Upright
2.Root hair
3. Uprooted
4. Taproots
5. Fibrous roots
6. Modification
7. Asparagus
8. Famine
9. Drought
III. Define:
Modification :- a change made to something
Marshy :- an area which is soft and muddy .
Annuals:- Flowering plants that complete their life cycle in one year.
Biennials :- Flowering plants that complete their life cycle in two year.
IV. Answer the following
1.What is a tap root?
Ans: In tap roots , the main root grows vertically downwards into the soil.
It has many smaller and thinner roots called root hair along the sides.
1. What are biennials plants ?
Ans: Flowering plants that complete their lifecycle in two years are called
biennials . In the first year,these plants produce leaves and in the second year,
their flowers bloom.
2. Name two plants that have storage roots and two plants that have
fibrous roots.
Ans: Two plants that have storage roots are radish plant and carrot plant.
V. Answer in detail
1. What are the functions of roots ?
Ans
Roots hold the plant firmly to the ground.
They prevent the plant from getting uprooted by strong winds or storms.
Roots bind the soil and prevent the soil from being blown away by wind
or washed away by water.
Roots help a plant to absorb water and minerals from the soil.
2.How do breathing roots help plants?
Ans: Breathing roots are found in plants that grow in salty water
and marshy regions . The soil in these regions has little air. The soil in these
regions has little air . Therefore , the roots of these plants grow vertically
above the water to absorb air. Mangroves have breathing roots.
3.Name three uses of flowers and give two examples each.
Ans:
Flowers are useful to us in many ways .
Some flowers such as broccoli , cauliflower and moringa flower(drumstick)
are eaten as vegetables.
Hibiscus , chrysanthemum, rose , chamomile and basil flowers are used as
tea.
Some flowers such as cloves , saffron and capers are used as spices.
Holy Basil(tulsi), passion flower and calendu
VI. Hots
Everyday you see a tree while going to school , you noticed a flower blooming
in the tree. After few days you find some changes in the flower. Now can you
tell me what happened to that flower ?
Ans: The flower started to grow as a fruit.
VII. Assignment question
1. Name the flowering plant which do not posses leaves.
2. Which part of the plants prevent soil erosion ?
VIII.Diagram
i)Draw a) tap root and b) fibrous root
ii)Parts of flower
