If concepts are clear and explained in easy and simple words, learning science becomes very easy and also becomes a subject of fun. In science, we study plants and animals’ energy, forces, and the human body. In the science subject, we also study scientific studies. The easy way to learn and a quick revision, practicing MCQs, is a very good choice. We have prepared 25 unique and very simple MCQs with correct answers in very simple and easy language for you. MCQs cover topics like the solar system, natural processes, invention, the environment, and the basic concepts of physics, chemistry, and biology.
In which branch of science do we study the movement of planets, stars, and galaxies in outer space?
a) Physics
b) Astronomy
c) Chemistry
d) Biology
Correct Answer: b) Astronomy
In scientific studies, what is the process called when water changes into vapor because of heat?
a) Melting
b) Freezing
c) Evaporation
d) Condensation
Correct Answer: c) Evaporation
Which part of a plant mainly makes food by using sunlight, water, and carbon dioxide?
a) Root
b) Leaf
c) Stem
d) Flower
Correct Answer: b) Leaf
In a scientific experiment, what is the name of the factor that scientists keep the same always?
a) Independent variable
b) Control variable
c) Dependent variable
d) Random variable
Correct Answer: b) Control variable
Which human body system is mainly responsible for carrying oxygen through the blood to different body parts?
a) Nervous system
b) Digestive system
c) Circulatory system
d) Skeletal system
Correct Answer: c) Circulatory system
When a solid changes directly into a gas without becoming liquid, what process is it called?
a) Condensation
b) Sublimation
c) Freezing
d) Fusion
Correct Answer: b) Sublimation
Which unit is commonly used in scientific studies to measure the amount of electric current flowing?
a) Volt
b) Ampere
c) Ohm
d) Watt
Correct Answer: b) Ampere
Which gas in Earth’s atmosphere is most important for humans and animals to stay alive?
a) Nitrogen
b) Carbon dioxide
c) Oxygen
d) Helium
Correct Answer: c) Oxygen
Which simple scientific tool helps us to see very tiny objects that cannot be seen with the eyes?
a) Microscope
b) Telescope
c) Periscope
d) Binoculars
Correct Answer: a) Microscope
Which form of energy is mainly released when we burn wood, coal, or cooking gas at home?
a) Electrical energy
b) Nuclear energy
c) Heat energy
d) Sound energy
Correct Answer: c) Heat energy
Which scientist is famous for explaining the law of gravity when he saw an apple fall?
a) Galileo Galilei
b) Isaac Newton
c) Albert Einstein
d) Charles Darwin
Correct Answer: b) Isaac Newton
In scientific studies, what is the name of animals that eat only plants for their survival?
a) Carnivores
b) Omnivores
c) Herbivores
d) Decomposers
Correct Answer: c) Herbivores
Which organ in the human body mainly controls thinking, memory, emotions, and decision-making?
a) Heart
b) Brain
c) Lungs
d) Liver
Correct Answer: b) Brain
Which scientific process allows plants to convert sunlight into food by making glucose and oxygen?
a) Respiration
b) Photosynthesis
c) Fermentation
d) Germination
Correct Answer: b) Photosynthesis
In scientific experiments, what do we call the information or numbers collected during the study?
a) Result
b) Data
c) Report
d) Evidence
Correct Answer: b) Data
Which gas do humans and animals release when they breathe out after using oxygen inside the body?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Correct Answer: c) Carbon dioxide
What is the name of the force that pulls objects towards the center of the Earth and keeps us standing on the ground?
a) Friction
b) Gravity
c) Magnetism
d) Tension
Correct Answer: b) Gravity
Which part of the human digestive system mainly absorbs nutrients from food into the blood?
a) Stomach
b) Large intestine
c) Small intestine
d) Esophagus
Correct Answer: c) Small intestine
Which natural satellite goes around the Earth and controls tides in oceans using its gravitational force?
a) Sun
b) Moon
c) Mars
d) Jupiter
Correct Answer: b) Moon
Which scientific invention changed human communication by allowing people to talk over long distances?
a) Telephone
b) Computer
c) Radio
d) Television
Correct Answer: a) Telephone
Which planet in our solar system is called the “Red Planet” because of its iron-rich soil?
a) Venus
b) Mars
c) Jupiter
d) Saturn
Correct Answer: b) Mars
Which simple machine is used to lift heavy loads easily by applying force at one point?
a) Wheel
b) Lever
c) Pulley
d) Screw
Correct Answer: b) Lever
Which scientist gave the theory of evolution and explained natural selection in living organisms?
a) Gregor Mendel
b) Charles Darwin
c) Louis Pasteur
d) Alexander Fleming
Correct Answer: b) Charles Darwin
Which organ in the human body is responsible for filtering blood and making urine?
a) Heart
b) Lungs
c) Kidneys
d) Pancreas
Correct Answer: c) Kidneys
Which energy resource is renewable and comes from sunlight that can be converted into electricity?
a) Solar energy
b) Coal energy
c) Oil energy
d) Nuclear energy
Correct Answer: a) Solar energy