Page 77 - Genius Kidz Prudence Learning Sc-8

TEST PAPER - 1
TEST PAPER - 1
(BASED ON CHAPTERS 1-8)

1. Short answer type questions.
(a) Viruses are considered to be on the borderline of living and non-living. Explain why?
(b) How does salt prevent food spoilage?

(c) List the steps involved in crop production in sequential order.
(d) Discuss with an example how hybridization is used for developing new varities of crops with
desired characteristics?
(e) Briefly describe methods used for preventing corrosion of metals.

(f) What do you mean by Red Data Book? Why did IUCN prepare it?

2. A new method of grain storage involves the use of nitrogen gas. Explore more about this method
and explain its implementation.

3. Why are bells made of metals and not of wood.

4. Long answer types questions.
(a) What are the main points of cell theory of life?

(b) Living things are made up of cells while non-living things are made up of atoms and molecules. Do
you agree? Give reasons.
(c) How can we prevent the following diseases :
(i) Cholera (ii) Typhoid (iii) Hepatitis A

(d) Hens and Frogs are both oviparous exhibiting different types of fertilization. Explain.
(e) Amit always eats only dal and rice in every meal. He often falls ill and has become prone to
diseases. Can you suggest changes in his diet which can make him healthy and free from diseases?

5. Give reasons for the following :

(a) Fresh milk is boiled before consumption while processed milk stored in packets can be consumed
without boiling.

(b) Raw vegetables and fruits are kept in refrigerators whereas jams and pickles can be kept outside.
(c) Farmers prefer to grow beans and peas in nitrogen deficient soils.

(d) Mosquitoes can be controlled by preventing stagnation of water though they do not live in water.
Why?

6. Classify the following terms into cells, tissues and organs and write in the tabular column given
below :
RBC, WBC, nerve cell, blood, muscle, blood vessels, brain, heart, hand

Cell Tissue Organ
_______________ _______________ _______________

_______________ _______________ _______________
_______________ _______________ _______________

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