Science Olympiad Questions – Class 5 & 6 (MCQs)
-
Which of these is not a source of light?
a) Sun
b) Candle
c) Moon
d) Bulb -
Which force pulls objects toward the Earth’s center?
a) Friction
b) Gravity
c) Magnetism
d) Push -
What happens to a shadow when the light source moves closer to an object?
a) Becomes smaller
b) Becomes bigger
c) Disappears
d) Changes color -
Which simple machine is a pair of scissors?
a) Lever
b) Pulley
c) Screw
d) Inclined plane -
The unit of electric current is:
a) Newton
b) Volt
c) Ampere
d) Joule -
Which of these is a good conductor of electricity?
a) Rubber
b) Plastic
c) Wood
d) Copper -
What energy change takes place in a solar panel?
a) Light to Sound
b) Light to Heat
c) Light to Electrical
d) Light to Chemical -
Which device is used to measure temperature?
a) Thermometer
b) Barometer
c) Compass
d) Hydrometer -
Which of these objects uses a magnet?
a) Wristwatch
b) Refrigerator door
c) Wooden box
d) Paper cup -
A body at rest will remain at rest unless acted upon by a force. This is:
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation -
Which gas is necessary for burning?
a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Hydrogen -
Which metal is liquid at room temperature?
a) Iron
b) Mercury
c) Copper
d) Silver -
Which of these is a physical change?
a) Burning paper
b) Melting ice
c) Rusting of iron
d) Cooking food -
The chemical formula of water is:
a) CO₂
b) O₂
c) H₂O
d) HO₂ -
Which acid is present in lemons?
a) Lactic acid
b) Citric acid
c) Acetic acid
d) Hydrochloric acid -
Which metal is used in making wires?
a) Zinc
b) Lead
c) Copper
d) Aluminum -
Which of these is not a mixture?
a) Air
b) Salt water
c) Pure gold
d) Steel -
The gas used in fire extinguishers is:
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen -
Which material is biodegradable?
a) Plastic bag
b) Cotton cloth
c) Glass
d) Aluminum foil -
Rusting of iron requires:
a) Oxygen and Water
b) Carbon dioxide and Heat
c) Sunlight and Oxygen
d) Only Oxygen -
The smallest unit of life is:
a) Tissue
b) Cell
c) Organ
d) Atom -
Which part of the plant makes food?
a) Stem
b) Roots
c) Leaves
d) Flowers -
Which organ purifies blood in the human body?
a) Heart
b) Lungs
c) Kidney
d) Stomach -
Which gas do humans exhale?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen -
Which vitamin do we get from sunlight?
a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D -
Which organ helps in pumping blood?
a) Brain
b) Heart
c) Kidney
d) Lungs -
Which of these is a communicable disease?
a) Diabetes
b) Tuberculosis
c) Cancer
d) Asthma -
What is the function of red blood cells?
a) Fight germs
b) Carry oxygen
c) Digest food
d) Make hormones -
Which part of the plant absorbs water?
a) Stem
b) Root
c) Leaf
d) Flower -
Which of these is an example of a carnivore?
a) Cow
b) Goat
c) Lion
d) Rabbit -
The planet known as the “Red Planet” is:
a) Venus
b) Mars
c) Jupiter
d) Mercury -
Which is the largest planet in our solar system?
a) Saturn
b) Earth
c) Jupiter
d) Neptune -
Which celestial body is closest to Earth?
a) Mars
b) Sun
c) Moon
d) Venus -
What causes day and night?
a) Revolution of Earth
b) Rotation of Earth
c) Movement of Sun
d) Clouds -
The ozone layer protects us from:
a) Infrared rays
b) X-rays
c) Ultraviolet rays
d) Gamma rays -
Which is the hottest planet in our solar system?
a) Mercury
b) Venus
c) Mars
d) Jupiter -
Which is called the “Blue Planet”?
a) Earth
b) Neptune
c) Uranus
d) Saturn -
The instrument used to see stars and planets is:
a) Microscope
b) Telescope
c) Periscope
d) Endoscope -
Which natural disaster is measured on the Richter scale?
a) Cyclone
b) Earthquake
c) Flood
d) Tsunami -
Which layer of Earth do we live on?
a) Core
b) Mantle
c) Crust
d) Atmosphere -
Which of these is a renewable source of energy?
a) Coal
b) Petrol
c) Solar
d) Diesel -
Which process converts water into vapor?
a) Condensation
b) Evaporation
c) Freezing
d) Melting -
Which gas is most abundant in Earth’s atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Argon -
Which of these animals lays eggs?
a) Cat
b) Dog
c) Hen
d) Cow -
Which instrument measures air pressure?
a) Thermometer
b) Barometer
c) Anemometer
d) Hygrometer -
Which of these is an example of a non-metal?
a) Copper
b) Iron
c) Sulphur
d) Silver -
Which is the fastest land animal?
a) Horse
b) Tiger
c) Cheetah
d) Leopard -
Which of these is a man-made fiber?
a) Cotton
b) Wool
c) Silk
d) Nylon -
Which part of the candle burns to give light?
a) Wick
b) Wax
c) Holder
d) Smoke -
Which of these is an example of an omnivore?
a) Cow
b) Dog
c) Lion
d) Goat
Science Olympiad Questions – Class 5 & 6 (Mcqs) by The Busy Brains
✅ Answer Key
1-c
2-b
3-b
4-a
5-c
6-d
7-c
8-a
9-b
10-a
11-b
12-b
13-b
14-c
15-b
16-c
17-c
18-b
19-b
20-a
21-b
22-c
23-c
24-c
25-d
26-b
27-b
28-b
29-b
30-c
31-b
32-c
33-c
34-b
35-c
36-b
37-a
38-b
39-b
40-c
41-c
42-b
43-b
44-c
45-b
46-c
47-c
48-d
49-a
50-b
