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Fundamental Science Facts

Basic Science

A collection of easy-to-understand questions testing basic scientific knowledge across various fields.

science knowledge facts general easy
20 Questions Easy Ages 5+ Apr 15, 2026
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About this Study Set

This study set covers Basic Science through 20 practice questions. A collection of easy-to-understand questions testing basic scientific knowledge across various fields. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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

1 What is the chemical symbol for water?
  • A O2
  • B H2O
  • C CO2
  • D NaCl
2 Which planet is known as the 'Red Planet'?
  • A Earth
  • B Jupiter
  • C Mars
  • D Venus
3 What force keeps us on the ground?
  • A Magnetism
  • B Friction
  • C Gravity
  • D Inertia
4 What gas do plants absorb from the atmosphere for photosynthesis?
  • A Oxygen
  • B Nitrogen
  • C Carbon Dioxide
  • D Hydrogen
5 What is the basic unit of life?
  • A Atom
  • B Molecule
  • C Cell
  • D Organ
6 What is the closest star to Earth?
  • A Alpha Centauri
  • B The Moon
  • C The Sun
  • D Sirius
7 What is the process by which plants make their own food?
  • A Respiration
  • B Evaporation
  • C Photosynthesis
  • D Fermentation
8 What is the hardest natural substance on Earth?
  • A Gold
  • B Iron
  • C Diamond
  • D Quartz
9 What state of matter has a definite volume but no definite shape?
  • A Solid
  • B Liquid
  • C Gas
  • D Plasma
10 What instrument is used to measure temperature?
  • A Barometer
  • B Anemometer
  • C Ruler
  • D Thermometer
11 What is the process of water turning into vapor?
  • A Condensation
  • B Precipitation
  • C Evaporation
  • D Sublimation
12 Which element makes up most of the Earth's atmosphere?
  • A Oxygen
  • B Carbon Dioxide
  • C Helium
  • D Nitrogen
13 What is the process by which plants release water vapor into the atmosphere?
  • A Photosynthesis
  • B Transpiration
  • C Absorption
  • D Germination
14 What is the scientific study of living organisms?
  • A Geology
  • B Astronomy
  • C Biology
  • D Chemistry
15 What is the name of the process where water vapor cools and turns back into liquid water?
  • A Evaporation
  • B Boiling
  • C Condensation
  • D Freezing
16 Which of the following is a conductor of electricity?
  • A Rubber
  • B Wood
  • C Metal
  • D Plastic
17 What is the main function of red blood cells?
  • A Fighting infection
  • B Carrying oxygen
  • C Clotting blood
  • D Producing energy
18 What is the process of a solid turning directly into a gas?
  • A Melting
  • B Evaporation
  • C Condensation
  • D Sublimation
19 What part of a plant is responsible for absorbing sunlight?
  • A Roots
  • B Stem
  • C Leaves
  • D Flower
20 What is the unit of force?
  • A Watt
  • B Joule
  • C Newton
  • D Volt
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