CBSE Class 3 EVS Plants Around Us Worksheet

Exercise

Tick the correct option.

Question. Through which of the following processes do the seeds of lady’s finger disperse?
a. wind
b.Water
c.explosion 
d.Animal
Answer. C

Question. Which of the following provides food to the baby plant?
a. seed coat
b. Stem
c. root
d. Cotyledon.
Answer. D

Question. Which of the following is an example of dicotyledonous seed?
a. Rice
b. Beans
c maize
d. Wheat.
Answer. B

Question. Which of the following fruits has only one seed?
a. Mango 
b papaya
c. Orange
d. Watermelon
Answer. A

Question. Which of the following is an example of Rabi crop?
a. Maize
b. Cotton
c. rice
d. Mustard.
Answer. D

Fill in the blanks.

1. Once the leaves are formed in a plant ,the ………dicotyledons…………………….. are shed.
2. Seeds are found inside………fruit………………….
3. The radical forms the……root………………..
4. Rabi crops grown in………winter………….
5. Seeds scattered by…………wind………... have wings or hair on them.
6.A…………coconut………………. floats on water and is carried away to far off places.

Answer in one word.

1. the process of changing a seed into a seedling…………Germination……... ……..
2. a baby plant is also called an……embryo……………………
3. a seed with spines……………Xanthium…………………………..
4. leaves present inside the seed coat………cotyledons………………
5. soil in which Bajra grows…………sandy soil…………….

Differentiate between

1.
Radicle                                                         plumule
Baby root in embryo is called radicle           Baby shoot in embryo is called plumule
it grows downward                                       it grows upward
2.
seed germination                                         seed dispersal
The developing of a seed into Seedling       scattering of seeds
3.
dicotyledonous                                             Monocotyledonous seed
It has two cotyledons                                   it has only one cotyledon
Peas , chick peas                                        rice,wheat

Short answer questions

Question. Why should seeds be dispersed?
Answer. To get proper light, space ,mineral and water to grow.

Question. What are the Agents of dispersal of seeds?
Answer. a.Water b. Animals c.Air d.Explosion

Question. What are the three things from which crops should be protected?
Answer. a.Grass eating animals b. Pests c. diseases

Question. What happens after the crops are harvested?
Answer. After the crops are harvested, they are stored in godowns and cold storage or are sold in the market directly.

Question. Name two crops that grow in sandy soil.
Answer. Jowar and bajra

Question. What are cotyledons?
Answer. Inside a seed coat, there are seed leaves called cotyledons. it has food in it for the baby plant

Question. Define crops. What are the two types of crops?
Answer. Crops are plants of the same kind that are grown in a particular area during a particular season
There are two types of crops:- Rabi crops, kharif crops.

Question. Name two winters and two summer crops?
Answer. Winter crops:- gram, wheat
Summer crops:-pumpkins, watermelon, jowar.

Long answer questions.

Question. Expain the germination of a seed. What are the conditions necessary for the germination of seeds?
Answer. a. seed in soil takes water and seed coat get soft.
b. seed coat and radical comes out it. After that plumule comes out.
c. firstly plumule takes food from cotyledons and when the new leaves comes out, they start making food from sunlight.
Conditions necessary for germination
a. Right amount of air, water, soil and warmth.
b. Protection from insects, birds and heavy rains.

Question. Why do some seeds not grow into a new plant?
Answer. a.They do not get right amount of air, water, soil and warmth.
b. some seeds are eaten by insects and animals.

Question. Explain dispersal of seeds by wind and explosion?
Answer. Some seeds have wings or are light tufts of hair on them. These seeds are easily dispersed by wind. For example:- seed of cotton

Question. Define agriculture . What are the various steps involved in agriculture?
Answer. Agriculture:- practice of growing crops on a large scale
1. Soil preparation.
2. Sowing.
3. Manuring.
4. Irrigation. .
5. Weeding.
6. Harvesting.
7. Storage.

Question. How can we grow healthy crops?
Answer.1.Knowledge of suitable soil, climate and season is essential to grow crops.
2. Manure and fertilisers should be added to the soil .

Give reason

Question. Some seeds have hooks or spines
Answer. Hooks or spines help a seed to disperse.

Question. Rice is mostly grown in West Bengal.
Answer. West Bengal get sufficient rainfall for rice crop.

Higher Order Thinking Skills 

Question. Coconut trees are found in great number in the coastal areas. Give a reason.
Answer. Coconut seeds are dispersed by water. Coconuts tree roots also need constant wetness.

Question. Tina collected the leaves of a rose plant as she wanted to grow new plants from them. Will she be able to grow new rose plants ?What should she do instead?
Answer. No. She can use stems in place of leaves to grow new rose plants.