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Test your basic science knowledge with 15 easy questions and answers on biology, chemistry and space.
1. Which body system includes the heart and blood vessels?
💡 The circulatory system, including the heart and blood vessels, moves blood throughout the body.
2. What do we call the path a planet takes as it circles the sun?
💡 A planet's orbit is the curved path it follows as it travels around the sun.
3. What do we call energy that comes from the sun?
💡 Solar energy is energy harnessed directly from sunlight, often using solar panels.
4. Which state of matter has neither a fixed shape nor a fixed volume?
💡 A gas expands to fill any container, having no fixed shape or fixed volume.
5. What is the main function of red blood cells?
💡 Red blood cells contain hemoglobin, which binds to oxygen and carries it throughout the body.
6. Which gas makes up most of the air we breathe?
💡 Nitrogen accounts for about 78% of Earth's atmosphere, the largest share of any gas.
7. What do we call the protective case a caterpillar forms before becoming a butterfly?
💡 A chrysalis is the hardened protective case in which a caterpillar transforms into a butterfly.
8. Which organ produces bile to help digest fats?
💡 The liver produces bile, which helps break down fats during digestion.
9. What do we call animals that can live both on land and in water?
💡 Amphibians, like frogs, typically live part of their life in water and part on land.
10. Which planet is known for being tilted almost completely on its side?
💡 Uranus has an extreme axial tilt of about 98 degrees, causing it to essentially roll along its orbit.
11. Which natural resource covers most of the Earth's surface?
💡 Water covers about 71% of the Earth's surface, mostly in the form of oceans.
12. What gas do plants release that humans and animals need to breathe?
💡 Plants release oxygen as a byproduct of photosynthesis, which most living organisms depend on to survive.
13. What do we call the sun, moon, planets, and stars collectively?
💡 Celestial bodies is a general term referring to natural objects in space, such as stars, planets, and moons.
14. What is the chemical symbol for gold?
💡 Gold's chemical symbol, Au, comes from its Latin name 'aurum'.
15. Which of these planets has no moons at all?
💡 Venus, along with Mercury, is one of only two planets in our solar system with no moons.