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8T1 SCI REV

Total questions: 40

Worksheet time: 29mins

Name
Class
Date
1.

Electric current is a ______quantity

a)

a. base

b)

b. supplementary

c)

c. derived

d)

d. professional

2.

SI unit of temperature is ______

a)

a. celsius

b)

b. fahrenheit

c)

c. kelvin

d)

d. ampere

3.

The coldness or hotness of a substance is expressed by -------.​ (a)  

4.

Amount of substance gives the number of particles present in a substance. 

a)
True
b)
False
5.

The value of the atmospheric pressure at sea level is

a)

a. 76 cm of mercury column

b)

b. 760 cm of mercury column

c)

c. 176 cm of mercury column

d)

d. 7.6 cm of mercury column

6.

Hydraulic lift works under the principle of ----------.​

a)
Pascal`s Law
b)

Archimedes’ Principle

c)

Bernoulli’s Principle

d)

Newton’s Third Law

7.

A moving body comes to rest due to friction alone.

a)
True
b)
False
8.

If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?

a)

a) 10 cm

b)

b) 5 cm 

c)

c) 20 cm 

d)

d) 15 cm

9.

Geometric centre of the spherical mirror is --------.​ (a)  

10.

The distance from the pole to the focus is called

a)

a) pole length

b)

b) focal length

c)

c) principal axis

d)

d) None of the above

11.

Burning of paper is a __________ change.

a)

a) physical

b)

b) chemical

c)

c) physical and chemical

d)

d) neutral

12.

Photosynthesis is a chemical reaction that takes place in the presence of ---------.​

a)

Nitrogen

b)

Sunlight

c)

Oxygen

d)

Carbon dioxide

13.

Formation of slaked lime from quicklime is an endothermic reaction.

a)
True
b)
False
14.

The liquid metal used in thermometers is

a)

a) copper 

b)

b) mercury 

c)

c) silver 

d)

d) gold

15.

The symbol of tungsten is --------.​ (a)  

16.

Tungsten

a)

a. Making the filament of a bulb

b)

b. Sewing needle

c)

c. For making wires

d)

d. As a fuel for ignition in rocket

17.

Pencil lead contains

a)

a) graphite

b)

b) diamond

c)

c) aluminium

d)

d) sulphur

18.

Solvay process is a method to manufacture

a)

a) lime water

b)

b) aerated water

c)

c) distilled water

d)

d) sodium carbonate

19.

Dry ice is used as a ----------.​

a)

Fertilizer

b)

Fuel

c)

Refrigerant

d)

Solvent

20.

Carbon‘dioxide

a)

a. Fire extinguisher

b)

b. Fertilizer

c)

c. Respiration in living animals

d)

d. Refrigerator

21.

Microorganisms are measured in _______.

a)

a) cm 

b)

b) mm 

c)

c) micron 

d)

d) meter.

22.

Female anopheles mosquito is a carrier of dengue virus.

a)
True
b)
False
23.

Citrus canker is transmitted by insects. 

a)
True
b)
False
24.

The well-developed sporophytic plant body is seen in

a)

a) bryophytes

b)

b) pteridophytes

c)

c) gymnosperms

d)

d) angiosperms

25.

Binominal Nomenclature was first introduced in the year

a)

a) 1970

b)

b) 1975

c)

c) 1978

d)

d) 1623

26.

Monocotyledon seed bears only ------- cotyledon.​ (a)  

27.

______________ cells are specialised cells that can be transformed into any kind of cells.

a)

a) Nerve 

b)

b) Stem 

c)

c) Heart 

d)

d) Bone

28.

Carbohydrates

a)

a. glucose

b)

b. amino acid

c)

c. CO2, water and heat

d)

d. Amino acids

29.

The process of air passing in and out the lungs is called ______________.

a)

a) inhalation     

b)

b) exhalation

c)

c) breathing 

d)

d) None of these

30.

Maintenance of constant internal environment of the body is known as

a)

a) homeostasis

b)

b) homeophytes

c)

c) homeokinesis

d)

d) homeophilics

31.

Match the following

a)

Static friction

1.

Objects are at Rest

b)

Kinetic friction

2.

Objects are in motion

c)

Rolling friction

3.

Least frriction

d)

Sliding friction

4.

Objects are sliding

32.

Match the following

a)

Convex mirror

1.

Rear view mirror

b)

Parobolic mirror

2.

Radio telescopes

c)

Regular reflection

3.

Plane mirror

d)

Irregular reflection

4.

Wall

33.

Match the following

a)

Conduction

1.

Solid

b)

Convection

2.

Liquid

c)

Radiation

3.

Gas

d)

Sublimation

4.

Solid to gas

e)

Condensation

5.

Gas to Liquid

34.

Match the following

a)

Iron

1.

Sewing needle

b)

Copper

2.

For making wires

c)

Tungsten

3.

Making the filament of a bulb

d)

Boron

4.

As a fuel for ignition in rocket.

35.

Match the following

a)

Atom

1.

building block of matter

b)

Element

2.

atoms of the same kind

c)

Compound

3.

atoms of different kinds

d)

Molecule

4.

smallest unit of a substance

36.

Match the following

a)

Nitrogen

1.

Fertilizer

b)

Oxygen

2.

Respiration in living animals

c)

Carbon dioxide

3.

Fire extinguisher

d)

Dry ice

4.

Refrigerator

37.

Match the following

a)

Nitrogen fixing bacteria

1.

Rhizobium

b)

Tuberculosis

2.

Bacteria

c)

Kuru

3.

Prion

d)

Probiotics

4.

Lactobacillus acidophilus

e)

Edward Jenner

5.

Vaccine

38.

Based on shape, the bacteria are classified into …………….. types.

a)

2

b)

3

c)

4

d)

5

39.

Soil erosion is prevented by …………….. plants.

a)

Algae

b)

Fungi

c)

Bryophytes

d)

Pteridophytes

40.

The process of air passing in and out the lungs is called ………………

a)

Inhalation

b)

Exhalation

c)

Breathing

d)

None of these

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