Can You Get All 50 Science Questions Right?
Test your knowledge of biology, space, chemistry, physics and Earth science. These 50 original multiple-choice questions progress from familiar science facts to more challenging ideas, with a helpful explanation after every answer.
Think like a scientist. Choose the best answer.
Each question includes four possible answers. Select one to see whether it is correct and read a short explanation. Every correct answer earns one point. Your first choice is final.
How to Play
- Press Start to begin.
- Read the question carefully and select one answer from four options.
- After answering, review the explanation to understand the science behind it.
- Use Next question to continue through all 50 questions.
- See your final score and try again if you want more practice.
What You Will Learn
Biology: Discover how living cells, plants, animals and human organs function. Physics: Practice ideas about forces, sound, light, motion and energy. Chemistry: Recognize common elements, bonding and chemical changes. Earth science: Review the atmosphere, water cycle, rocks and plate tectonics. Space: Explore the planets, stars, eclipses and astronomical measurements.
Three Science Tips That Help
Pay attention to conditions. Water boils at 100°C under standard atmospheric pressure, but the temperature changes with pressure. A well-written science answer specifies the conditions.
Know the difference between an observation and an explanation. Seeing water droplets on a cool surface is an observation; condensation explains how they form.
Learn the units. A light-year measures distance, not time. An ampere measures electric current, a newton measures force, and a joule measures energy.
Frequently Asked Questions
Is this science quiz free? Yes. No account or sign-up is required.
Will my answers be stored? The score is calculated inside your browser; the quiz does not send your selected answers to a server.
Does each question have an explanation? Yes. You will see an explanation after choosing an option.
Can I retake the quiz? Yes. Replay shuffles the same 50 questions and the answer choices.
Sources and Further Learning
For additional explanations and educational materials, see NASA Science, NOAA Education, USGS Educational Resources, and Encyclopaedia Britannica Science.