Science Basics

1. What is the boiling point of water at sea level?

💡 Water boils at exactly 100°C (212°F) at standard atmospheric pressure at sea level.

2. What gas do humans need to breathe to survive?

💡 Humans breathe oxygen to carry out cellular respiration, which produces energy for the body.

3. What state of matter has no fixed shape or volume?

💡 Gas has no fixed shape or volume and expands to fill whatever container it is in.

4. Which organ pumps blood around the human body?

💡 The heart is a muscular organ that pumps blood through the circulatory system continuously.

5. What do plants need to make their own food?

💡 Plants use sunlight and water in a process called photosynthesis to produce glucose for energy.

6. How many bones does an adult human body have?

💡 An adult human has 206 bones. Babies are born with around 270-300, which fuse as they grow.

7. What is the chemical symbol for water?

💡 Water is made of two hydrogen atoms and one oxygen atom, giving it the formula H₂O.

8. What is the closest star to Earth?

💡 The Sun is the closest star to Earth, at a distance of about 150 million kilometres.

9. What do you call a scientist who studies the weather?

💡 A meteorologist studies the atmosphere and weather patterns to forecast and understand weather.

10. What is the center of an atom called?

💡 The nucleus is the dense core of an atom, containing protons and neutrons.

11. Which planet is closest to the Sun?

💡 Mercury is the innermost planet in our solar system, completing one orbit around the Sun every 88 days.

12. What do we call the force that pulls objects toward Earth?

💡 Gravity is the force of attraction between masses. Earth's gravity keeps us on the ground.

13. Which is the largest planet in our solar system?

💡 Jupiter is the largest planet, so big that all other planets could fit inside it.

14. What is the most abundant gas in Earth's atmosphere?

💡 Nitrogen makes up about 78% of Earth's atmosphere, followed by oxygen at about 21%.

15. What is the powerhouse of the cell?

💡 Mitochondria produce ATP (energy) through cellular respiration, powering all cell activities.

Quiz Complete!