Install QuizVortex App
Play offline · Home screen icon · Faster loading
Play this easy science quiz online with 15 simple questions and answers on biology, physics and space — perfect for beginners.
1. Which organ pumps blood throughout the human body?
💡 The heart is a muscular organ that pumps blood through the circulatory system.
2. Which part of a plant mainly absorbs water from the soil?
💡 Roots absorb water and nutrients from the soil and anchor the plant in place.
3. How many bones are in the adult human body?
💡 The adult human skeleton typically has 206 bones, down from about 270 at birth as some fuse together.
4. What is the boiling point of water in Celsius?
💡 Water boils at 100°C (212°F) at standard atmospheric pressure.
5. What is the scientific study of living organisms called?
💡 Biology is the branch of science dedicated to studying living organisms and life processes.
6. What do we call water that has frozen solid?
💡 Ice is the solid state of water, forming when temperatures drop to 0°C or below.
7. What force pulls objects toward the center of the Earth?
💡 Gravity is the force of attraction that pulls objects toward Earth's center.
8. What is the chemical symbol for water?
💡 Water is made of two hydrogen atoms and one oxygen atom, giving it the formula H2O.
9. Which sense organ do we use to see?
💡 The eye detects light and allows the brain to interpret images, enabling vision.
10. What is the process by which plants make their own food called?
💡 Photosynthesis lets plants convert sunlight, water, and carbon dioxide into glucose and oxygen.
11. How many legs does a typical insect have?
💡 Insects have 6 legs, one of the key features that separates them from arachnids, which have 8.
12. Which planet is known as the Red Planet?
💡 Mars appears red due to iron oxide, or rust, covering much of its surface.
13. Which gas do humans need to breathe in order to survive?
💡 Oxygen is essential for cellular respiration, which produces the energy our bodies need.
14. Which planet is often called Earth's twin due to its similar size?
💡 Venus is close to Earth in size and mass, though its atmosphere and surface conditions are very different.
15. What is the closest star to Earth?
💡 The Sun is by far the closest star to Earth, providing light and heat that sustain life.