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Play this science quiz online — 15 medium-level questions and answers on biology, chemistry, and physics.
1. Which of Newton's laws states that for every action there is an equal and opposite reaction?
💡 Newton's Third Law describes how forces always occur in equal and opposite pairs.
2. What is the name of the process by which cells divide to form reproductive cells (gametes)?
💡 Meiosis produces gametes with half the usual number of chromosomes, essential for sexual reproduction.
3. What is the atomic number of carbon?
💡 Carbon has an atomic number of 6, meaning it has 6 protons in its nucleus.
4. Which blood type is known as the universal donor?
💡 O negative blood lacks the A, B, and Rh antigens, allowing it to be given to almost any patient in an emergency.
5. What is the pH value of a neutral solution?
💡 A pH of 7 is considered neutral, with values below 7 being acidic and above 7 being basic.
6. Which part of the brain primarily controls balance and coordination?
💡 The cerebellum coordinates muscle movements and helps maintain balance and posture.
7. What is the smallest particle of an element that still retains its chemical properties called?
💡 An atom is the basic building block of matter and the smallest unit of an element.
8. What is the term for heat transfer through direct physical contact?
💡 Conduction is the transfer of heat between objects that are touching, such as a hot pan warming a spoon.
9. Which cell organelle contains the cell's genetic material?
💡 The nucleus houses the cell's DNA, controlling gene expression and cell activities.
10. What is the chemical formula for methane?
💡 Methane, a simple hydrocarbon and greenhouse gas, has the chemical formula CH4.
11. What is the approximate speed of sound in air at room temperature?
💡 Sound travels at approximately 343 meters per second through air at room temperature.
12. What is the powerhouse of the cell responsible for producing ATP?
💡 Mitochondria generate ATP through cellular respiration, powering most of the cell's activities.
13. Which planet has the strongest recorded winds in the solar system?
💡 Neptune has extremely powerful winds, reaching speeds of up to 2,100 km/h, the fastest recorded in the solar system.
14. A deficiency of which vitamin causes the disease scurvy?
💡 Scurvy results from a prolonged lack of Vitamin C, causing fatigue, gum disease, and other symptoms.
15. What is the SI unit of force?
💡 The newton is the SI unit of force, defined as the force needed to accelerate one kilogram at one meter per second squared.