Question

SCIENCE- CLASS: 8
SEPTEMBER-TEST
TIME: 1.5 hrs M.M.: 40 Marks

NOTE: All Questions are Compulsory.

Q1. Fill in the blanks.
a) The first step before growing crops is _____________ of the soil.
b) Cholera is caused by __________.
c) Synthetic fibres are also called __________ or __________ fibres.
d) Iron is ____________reactive than copper.
e) Fossil fuels are ____________, ____________, and ____________ .
f) Burning of wood and coal causes __________of air.
g) A place where animals are protected in their natural habitat is called _________ .
h) Migratory birds fly to faraway places because of __________ changes.

(1x8=8)

Q2. Match the following in columns A and B.
COLUMN A
a). Organic Manure
b). Yeast.
c). Teflon.
d). Copper.
e). Blue Zone.
f). A Virus.
g). Rayon.
h). Carbon.

COLUMN B
i). Used to make non-stick cookware
ii). Electric Wire
iii). Hottest Part
iv). Causes AIDS
v). Animal Excreta, Cow Dung
vi). Prepared by using wood pulp
vii). Baking of Bread
viii). Fuel

(1x8=8)

Q3. True or False.
a). Species that are on the verge of Extinction are called Endangered Species.
b). It is difficult to burn a heap of green leaves but dry leaves catch fire easily.
c). CNG is more polluting fuel than petrol.
d). Kerosene is not a fossil fuel.
e). Sodium is a very reactive metal.
f). Generally, metals react with acids.
g). The process of conversion of sugar into alcohol is called Moulding.
h). Yeast is an Antibiotic.

(1x8=8)

Q4. Answer the Following.
Q4.i) Write physical properties of metals.


Q4.ii) What are the major groups of microorganisms?

Q4.iii) Explain why saucepan handles are made of thermosetting plastics.

Q4.iv) What happens when
(a) Dilute sulphuric acid is poured on a copper plate?
(b) Iron nails are placed in a copper sulphate solution?
Write word equations of the reactions involved.

Q4.v.a) Name the petroleum product used for surfacing of roads.

Q4.v.b) Uses of Coke

Q4.vi) Make a labelled diagram of a candle flame.

Q4.vii) Explain how CO2 in cylinders is able to control fires.

Q4.viii) Distinguish between Flora and Fauna.

(2x8=16)




Q5 What are harmful effects of deforestation?

(1x5=5​

Answer 1

This is your examination so that is better for you to do all questions yourself

Answer 2

Answer:

Ans 1.

a))preparation of soil

b) bacteria

c) synthetic or man made

d) more

e) coal, petroleum and natural gas

f) pollution

g) wildlife sanctuary

h) climatic

Ans 2.

a-v

b-vii