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Elementary Science Part 2

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

The gas used in soft drinks is —

a)

Oxygen

b)

Nitrogen

c)

Carbon dioxide

d)

Helium

2.

Vinegar is another name for —

a)

Acetic acid

b)

Citric acid

c)

Sulphuric acid

d)

Hydrochloric acid

3.

Which of the following is not a noble gas?

a)

Helium

b)

Neon

c)

Argon

d)

Hydrogen

4.

What is the main constituent of natural gas?

a)

Ethane

b)

Methane

c)

Propane

d)

Butane

5.

The chemical formula of table salt is —

a)

KCl

b)

NaCl

c)

NaOH

d)

Na₂CO₃

6.

What is used to neutralize acid in the stomach?

a)

Hydrochloric acid

b)

Antacid

c)

Alcohol

d)

Vinegar

7.

Which element is common to all acids?

a)

Hydrogen

b)

Oxygen

c)

Nitrogen

d)

Carbon

8.

The metal used in making aircrafts is —

a)

Iron

b)

Aluminum

c)

Lead

d)

Copper

9.

Which of these is a compound?

a)

Air

b)

Milk

c)

Water

d)

Brass

10.

Which gas turns lime water milky?

a)

Oxygen

b)

Carbon dioxide

c)

Ammonia

d)

Nitrogen

11.

The human heart has how many chambers?

a)

2

b)

3

c)

4

d)

5

12.

Photosynthesis requires —

a)

Sunlight, water, carbon dioxide

b)

Oxygen, nitrogen, sunlight

c)

Water, oxygen, glucose

d)

None of the above

13.

Which part of the plant anchors it to the soil?

a)

Stem

b)

Leaf

c)

Root

d)

Flower

14.

Human blood has how many groups?

a)

2

b)

3

c)

4

d)

5

15.

Which organ controls all functions of the human body?

a)

Heart

b)

Brain

c)

Liver

d)

Lungs

16.

Which animal lays eggs?

a)

Cow

b)

Cat

c)

Duck

d)

Dog

17.

Which part of the cell contains genetic material?

a)

Cytoplasm

b)

Nucleus

c)

Membrane

d)

Ribosome

18.

Which of these is a communicable disease?

a)

Diabetes

b)

Malaria

c)

Cancer

d)

Hypertension

19.

Which vitamin helps in blood clotting?

a)

Vitamin A

b)

Vitamin B

c)

Vitamin K

d)

Vitamin D

20.

Which of these animals is cold-blooded?

a)

Cow

b)

Snake

c)

Dog

d)

Elephant

21.

Which layer of the atmosphere contains the ozone layer?

a)

Troposphere

b)

Stratosphere

c)

Mesosphere

d)

Thermosphere

22.

Which gas is used by plants during photosynthesis?

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Hydrogen

23.

Soil erosion can be prevented by —

a)

Deforestation

b)

Afforestation

c)

Overgrazing

d)

Mining

24.

The main cause of acid rain is —

a)

CO₂ and O₂

b)

SO₂ and NO₂

c)

N₂ and H₂

d)

CO and H₂O

25.

The Earth revolves around the Sun in —

a)

24 hours

b)

30 days

c)

365 days

d)

12 months

26.

The process of growing plants without soil is —

a)

Hydroponics

b)

Photosynthesis

c)

Germination

d)

Plantation

27.

The main source of energy for the Earth is —

a)

Wind

b)

Sun

c)

Moon

d)

Fire

28.

Which renewable energy is produced from flowing water?

a)

Solar energy

b)

Hydroelectric energy

c)

Geothermal energy

d)

Tidal energy

29.

Global warming is mainly caused by —

a)

Decrease in CO₂

b)

Increase in CO₂

c)

Deforestation

d)

Both B and C

30.

Which planet is closest to the Sun?

a)

Venus

b)

Mercury

c)

Mars

d)

Earth

31.

Who invented the telephone?

a)

Thomas Edison

b)

Alexander Graham Bell

c)

James Watt

d)

Marconi

32.

The first man to walk on the Moon was —

a)

Neil Armstrong

b)

Yuri Gagarin

c)

Buzz Aldrin

d)

Rakesh Sharma

33.

X-rays were discovered by —

a)

Rutherford

b)

Roentgen

c)

Marie Curie

d)

Einstein

34.

The instrument used to measure humidity is —

a)

Barometer

b)

Hygrometer

c)

Thermometer

d)

Altimeter

35.

Which metal is used in thermometers?

a)

Lead

b)

Copper

c)

Mercury

d)

Zinc

36.

The inventor of the electric bulb was —

a)

Thomas Edison

b)

Michael Faraday

c)

Graham Bell

d)

Newton

37.

The largest planet in our solar system is —

a)

Earth

b)

Saturn

c)

Jupiter

d)

Neptune

38.

Which vitamin deficiency causes night blindness?

a)

Vitamin A

b)

Vitamin B

c)

Vitamin C

d)

Vitamin D

39.

What is the chemical name of common salt?

a)

Sodium hydroxide

b)

Sodium chloride

c)

Potassium chloride

d)

Calcium carbonate

40.

Sound travels fastest in —

a)

Air

b)

Water

c)

Steel

d)

Vacuum

41.

Which device is used to measure temperature?

a)

Barometer

b)

Thermometer

c)

Voltmeter

d)

Hygrometer

42.

What is the main source of oxygen on Earth?

a)

Forests

b)

Oceans and plants

c)

Volcanoes

d)

Mountains

43.

Which organ helps in breathing?

a)

Liver

b)

Lungs

c)

Kidney

d)

Stomach

44.

Water boils at what temperature (Celsius)?

a)

0°C

b)

50°C

c)

100°C

d)

150°C

45.

The normal pulse rate of an adult human is around —

a)

40–50

b)

60–100

c)

110–130

d)

30–40

46.

The main gas in air is —

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Helium

47.

The human body contains mostly —

a)

Water

b)

Blood

c)

Calcium

d)

Iron

48.

Which organ helps in digestion by producing bile?

a)

Kidney

b)

Liver

c)

Heart

d)

Lungs

49.

Which is the fastest land animal?

a)

Lion

b)

Cheetah

c)

Tiger

d)

Horse

50.

The study of weather is called —

a)

Zoology

b)

Ecology

c)

Meteorology

d)

Geology

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