Grade 6 Science Quiz: 30 Questions with Answers!
30 Science Quiz for Grade 6 Students Questions with Answers! FREE USA NGSS: cell powerhouse mitochondria, plant chloroplasts, food chain producers, H2O formula, gravity force, energy conservation, light vacuum fastest, sedimentary fossils. Perfect homeschool review, classroom test prep, science fair warm-up! Average 26/30—did you ace it?
Science Quiz for Grade 6 Students | 30 MCQs with Answers
Results
🎉 Congratulations! You Passed the Quiz!
Excellent work! 👏
You scored 70% or higher, which shows your knowledge is strong.
🧠 Keep testing your skills and exploring new topics.
🔥 You can now choose any quiz you like and continue learning.
Keep Going! You’re Learning 💡
You didn’t reach 70% this time — and that’s okay 👍
Every attempt helps you understand more.
📖 Review the questions and answers.
🧠 Try the quiz again and improve your score.
#1. What are the three main states that all matter can exist in depending on temperature and pressure?
#2. How many bones does the average adult human skeleton contain after all the baby bones have fused together?
#3. How long does it take for the Earth to complete one full rotation on its axis, creating day and night?
#4. Which materials allow electricity to flow easily through them, like copper wires?
#5. Which step of the water cycle changes liquid water from oceans and lakes into water vapor gas?
#6. Photosynthesis needs?
#7. For electric current to flow through a circuit and light a bulb, what must be present?
#8. What is the chemical formula for a molecule made of two hydrogen atoms bonded to one oxygen atom?
#9. Control center of cell?
#10. Living things need?
#11. What does sound travel through by causing molecules to vibrate one after another?
#12. What is an ecosystem made up of, including both living and non-living components?
#13. Which gas in Earth’s atmosphere traps heat from the Sun and contributes to the greenhouse effect?
#14. What type of rock forms when lava from volcanoes cools and hardens on the surface?
#15. How many main layers is the Earth made of from surface to center?
#16. What important gas do red blood cells carry from your lungs to all parts of your body?
#17. What molecule inside our cells carries the genetic instructions that we inherit from our parents?
#18. Which gas giant planet is famous for having beautiful icy rings that you can see with a telescope?
#19. Plant cells have, animal cells don’t?
#20. In which substance does light travel at its absolute fastest speed of 186,000 miles per second?
#21. What invisible force constantly pulls objects toward the center of the Earth?
#22. Powerhouse of the cell?
#23. When you mix vinegar (acid) with baking soda (base), what two products does the chemical reaction create?
#24. According to the Law of Conservation of Energy, energy can never be created or destroyed, it can only…?
#25. What natural processes slowly break down large rocks into smaller pieces over thousands of years?
#26. Which rocky planet is closest to the Sun and has the shortest year of only 88 Earth days?
#27. In which type of rock are you most likely to find preserved dinosaur bones and ancient footprints?
#28. What is the huge star at the exact center of our solar system that all planets orbit around?
#29. Food chain starts with?
#30. Which everyday material will a magnet stick to because it contains iron particles?
More Quiz –