General Science Quiz
General science mixes physics, chemistry, biology and earth science at an everyday level. It is useful for school exams and competitive tests that include a general science section.
What this quiz covers
- Everyday physics and chemistry
- Human health and nutrition
- Earth and environment
- Inventions and discoveries
Study tip: Read explanations for questions you got right as well; they often contain related facts that appear in other questions.
Questions, answers and explanations
1. Which planet is known as the Red Planet?
- Earth
- Mars
- Venus
- Jupiter
Answer: Mars
Mars is called the Red Planet because of iron oxide (rust) on its surface.
2. Which is the largest planet in our Solar System?
- Earth
- Saturn
- Jupiter
- Neptune
Answer: Jupiter
Jupiter is the largest planet in the Solar System.
3. Which layer of the Earth do we live on?
- Mantle
- Outer Core
- Crust
- Inner Core
Answer: Crust
Humans live on the Earth's outermost solid layer called the crust.
4. What is the boiling point of pure water at sea level?
- 90°C
- 95°C
- 100°C
- 110°C
Answer: 100°C
Pure water boils at 100°C (212°F) at standard atmospheric pressure.
5. Which natural satellite revolves around the Earth?
- Mars
- Moon
- Sun
- Venus
Answer: Moon
The Moon is Earth's only natural satellite.
6. Which gas is the most abundant in Earth's atmosphere?
- Oxygen
- Carbon Dioxide
- Nitrogen
- Hydrogen
Answer: Nitrogen
About 78% of Earth's atmosphere is made up of nitrogen.
7. What is the hardest natural substance on Earth?
- Gold
- Iron
- Diamond
- Quartz
Answer: Diamond
Diamond is the hardest naturally occurring substance.
8. Which vitamin is mainly obtained from sunlight?
- Vitamin A
- Vitamin C
- Vitamin D
- Vitamin K
Answer: Vitamin D
The skin produces Vitamin D when exposed to sunlight.
9. Which instrument is used to measure earthquakes?
- Thermometer
- Seismograph
- Barometer
- Hygrometer
Answer: Seismograph
A seismograph records and measures earthquake vibrations.
10. Which part of the human body contains the smallest bones?
- Hand
- Foot
- Ear
- Nose
Answer: Ear
The smallest bones (malleus, incus, and stapes) are found in the middle ear.
11. Which planet is known for its prominent ring system?
- Mars
- Jupiter
- Saturn
- Neptune
Answer: Saturn
Saturn is famous for its large and visible ring system.
12. Which layer of the Earth's atmosphere contains the ozone layer?
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
Answer: Stratosphere
The ozone layer is located in the stratosphere and protects Earth from harmful UV rays.
13. What is the chemical symbol for gold?
- Ag
- Au
- Gd
- Go
Answer: Au
Au comes from the Latin word 'Aurum', meaning gold.
14. Which organ in the human body is responsible for pumping blood?
- Lungs
- Brain
- Heart
- Liver
Answer: Heart
The heart pumps blood throughout the body via the circulatory system.
15. Which force pulls objects toward the Earth?
- Magnetic Force
- Electric Force
- Gravitational Force
- Frictional Force
Answer: Gravitational Force
Gravity is the force that attracts objects toward the Earth.
16. Which planet is closest to the Sun?
- Venus
- Earth
- Mercury
- Mars
Answer: Mercury
Mercury is the closest planet to the Sun.
17. Which gas do humans exhale during respiration?
- Oxygen
- Nitrogen
- Carbon Dioxide
- Hydrogen
Answer: Carbon Dioxide
Humans inhale oxygen and exhale carbon dioxide during respiration.
18. What is the largest organ inside the human body?
- Heart
- Liver
- Brain
- Lungs
Answer: Liver
The liver is the largest internal organ in the human body.
19. Which scientist developed the theory of relativity?
- Isaac Newton
- Albert Einstein
- Galileo Galilei
- Nikola Tesla
Answer: Albert Einstein
Albert Einstein developed the Special and General Theory of Relativity.
20. Which branch of science deals with the study of living organisms?
- Physics
- Chemistry
- Biology
- Geology
Answer: Biology
Biology is the branch of science that studies living organisms.