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General Basic Science Quiz

Basic Science

A collection of fundamental scientific facts covering biology, physics, and chemistry.

science education general-knowledge

20 Questions Easy Ages 5+ Oct 13, 2026

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About this Study Set

This study set covers Basic Science through 20 practice questions. A collection of fundamental scientific facts covering biology, physics, and chemistry. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 20 questions from the General Basic Science Quiz study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which planet is known as the Red Planet?

A Venus
B Mars
C Jupiter
D Saturn

2 What is the primary source of energy for the Earth's atmosphere?

A The Moon
B The Sun
C Geothermal heat
D Wind

3 Which state of matter has a definite shape and volume?

A Gas
B Liquid
C Plasma
D Solid

4 What gas do humans need to breathe in to survive?

A Carbon dioxide
B Nitrogen
C Oxygen
D Helium

5 Which organ in the human body pumps blood?

A Lungs
B Stomach
C Brain
D Heart

6 What is the hardest natural substance on Earth?

A Gold
B Diamond
C Iron
D Quartz

7 Which force pulls objects toward the center of the Earth?

A Magnetism
B Gravity
C Friction
D Electricity

8 How many legs does an insect typically have?

A Four
B Six
C Eight
D Ten

9 What is the process by which plants make their own food?

A Photosynthesis
B Respiration
C Digestion
D Fermentation

10 Which planet is the largest in our solar system?

A Earth
B Mars
C Jupiter
D Neptune

11 What is the freezing point of water at sea level in degrees Celsius?

A 0
B 10
C 32
D 100

12 Which part of the plant grows underground and absorbs water?

A Leaf
B Stem
C Flower
D Root

13 What do we call a scientist who studies stars and planets?

A Biologist
B Chemist
C Astronomer
D Geologist

14 Which of these is a mammal?

A Shark
B Frog
C Eagle
D Dolphin

15 What is the chemical symbol for water?

A CO2
B H2O
C O2
D NaCl

16 Which gas do plants absorb from the air to perform photosynthesis?

A Oxygen
B Carbon dioxide
C Hydrogen
D Nitrogen

17 What is the center of an atom called?

A Nucleus
B Electron
C Shell
D Proton

18 Which type of animal eats only plants?

A Carnivore
B Omnivore
C Herbivore
D Insectivore

19 What color does the sky appear on a clear day due to light scattering?

A Red
B Yellow
C Blue
D Purple

20 How many planets are there in our solar system?

A 7
B 8
C 9
D 10

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