*A) Fill in the blanks*
1.The activities or the tasks which are undertaken for cultivation of Crop are called______.
2.Rearing of honey bees on large scale is called ________.
3.The nitrogen deficiency in the soil can be made up by__________.
4. All the synthetic fibres are prepared by a number of processes using raw materials of Petroleum origin called ______.
5._______ is a mixture of polyester and cotton.
*B) Choose the correct option*
1.Which of the following is not a correct statement for sowing seeds
a)seeds should be sown at right intervals
b) seeds should be sown at right Dept
c)seeds should be sown in dry soil
d)seeds should not be sown in highly wet soil
2.This material cannot be used as a food preservative
a) sodium bisulphite
b)sodium hydroxide
c)sodium benzoate
d)citric acid
3.Seed drill is used to
a)sow the seed
b)remove the seeds
c) remove the pest
d) mix manure in the soil
4.Which fibre is used as artificial wool
a)cotton
b)acrylic
c)rayon
d)nylon
5.Mushroom belongs to
a)algae
b)virus
c)fungi
d) none of these
*C) Write One word for the given statement*
1.What is the meaning of poly in the word polymer?
2.Name the plastic formed by linear arrangement of monomers.
3. The disease which can spread from an infected person to a healthy person.
4.What is the process of cutting and gathering of crops after maturation known as ?
5.The process name used for formation of manure with the help of earthworm.
. *D ) Case Study Based Questions*
Answer the questions below the passage on the basis of your understanding of the paragraph in the related studies concept
Riya’s father got a transfer to another place. While sorting out the things Riya found many of her clothes of various fabrics were not fitting her or worn-out. She thought of burning them to get rid of them. But her friend Shweta suggested to donate it to some charity house so that it can be reused.
(a) Which fabrics are known to be skin friendly?
(b) Why we should not burn synthetic clothes?
(c) Why synthetic clothes are famous than natural fabrics?
*E *DIRECTION* :* In the following questions, a statement of
assertion (A) is followed by a statement of reason (R). Mark
the correct choice as:
(a) Both assertion (A) and reason (R) are true and
reason (R) is the correct explanation of assertion
(A).
(b) Both assertion (A) and reason (R) are true but
reason (R) is not the correct explanation of
assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
(e) Both Assertion and Reason are false.
1.Assertion
Disease which can get transmitted from one person to another by direct or indirect contact are called communicable diseases
Reason
Cholera Malaria, dysentery are transmitted through contaminated water , food, air insects, utensils etc.
2.Assertion
synthetic plastic and fibres are not affected by water, air, soil etc.
Reason
plastic is non- biodegradable and do not get corroded.
Answers
Answer:
A)
1. agriculture
2. apiculture
3. by using the principle of crop rotation
4. petrochemicals
5. Polycot
B)
1. d)
2. b)
3. a)
4. b)
5. c). C) 1. poly means many. 2. Polystyrene (1-1), poly(methyl methacrylate) (1-34), and poly(4-methyl pentene-1) (1-35) . 3 . Infectious diseases 4 . harvesting. 5 . Vermicomposting. D) a. cotton and silk. b. Synthetic fibres like Polyester catches fire very easily and melts. After melting It sticks to the body of the person wearing it causing severe burns. Hence it is advised not wear synthetic clothes while working in the Kitchen. c. Synthetic fibres have so popular because of their much superior properties as compared to natural fibres like cotton, silk and wool. ... Synthetic fibres are very strong. So the clothes made of synthetic fibres last for a long time. It is also used for making parachutes and ropes for rock climbing. E) 1. a). 2 . a)