Test your knowledge with this easy Science quiz. This quiz includes questions about science players, records, and history. Each session picks 10 random questions from 30 total — try again for a new set!
10 random questions from 30 total • easy
Each session picks different questions!
Below is the full question bank for this quiz. Each session picks 10 questions at random, so you'll see a different set every time you play. Answers and explanations are included for study and review.
What is the chemical symbol for oxygen?
The chemical symbol for oxygen is O.
What is the atomic number of hydrogen?
Hydrogen has atomic number 1.
What is the center of an atom called?
The nucleus is the center of an atom.
Which organ is responsible for pumping blood?
The heart pumps blood throughout the body.
What is the basic unit of life?
The cell is the basic unit of life.
What is the chemical symbol for iron?
Iron has the chemical symbol Fe.
What is the main gas found in Earth’s atmosphere?
Nitrogen makes up most of Earth’s atmosphere.
What is the hardest natural substance?
Diamond is the hardest natural substance.
What is the chemical symbol for sodium?
Sodium has the symbol Na.
What is the function of red blood cells?
Red blood cells carry oxygen.
Which planet has the most moons?
Jupiter has the most moons in our solar system.
What is the boiling point of water in Kelvin?
Water boils at 373 Kelvin.
What is the chemical symbol for silver?
Silver has the symbol Ag.
Which organ filters blood in the human body?
Kidneys filter blood.
What type of energy does the Sun produce?
The Sun produces energy through nuclear fusion.
What is the main function of chlorophyll?
Chlorophyll absorbs sunlight for photosynthesis.
What is the chemical formula for carbon dioxide?
Carbon dioxide is CO2.
Which vitamin is produced when skin is exposed to sunlight?
Sunlight helps produce Vitamin D.
What is the speed of sound in air approximately?
Speed of sound is about 340 m/s in air.
What is the chemical symbol for potassium?
Potassium has the symbol K.
What is the function of the brain?
The brain controls all body functions.
What is the most abundant element in the universe?
Hydrogen is the most abundant element.
What is the chemical symbol for calcium?
Calcium has the symbol Ca.
What is the process of water cycle?
The water cycle is continuous movement of water.
Which organ helps in breathing?
Lungs help in breathing.
What is the chemical symbol for carbon?
Carbon has the symbol C.
What is the main source of energy for Earth?
The Sun is the main energy source.
What is the function of white blood cells?
White blood cells fight infections.
What is the chemical symbol for helium?
Helium has the symbol He.
What is the main component of bones?
Bones are mainly made of calcium.
Science underpins everything from the food we eat to the devices we use daily, yet science literacy remains surprisingly low in many populations. This easy science quiz is designed to be both accessible and educational — covering fundamental concepts from biology, chemistry, physics, and earth science that every curious person should know.
Questions are pitched at secondary-school level: the kind of facts taught in science class that tend to be forgotten quickly but are genuinely useful to know. You will encounter questions about the periodic table, basic biology, the solar system, chemical reactions, and physical laws — framed in a way that is engaging rather than academic.
Doing well on this quiz is not about having studied science at an advanced level. It is about paying attention to the world around you and retaining the fascinating facts that explain how things work. Regular science trivia practice improves science literacy and can reignite curiosity in people who found classroom science dry.
Suitable for all ages and ideal as a warm-up before tackling the medium or hard science quizzes.
Biology, chemistry, physics, earth science, and astronomy — all at an introductory level.
Yes. The easy tier is suitable for ages 10 and up.
Both. Each question comes with an explanation so you learn something whether you get it right or wrong.
Try the medium science quiz for more challenging questions.
