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Play this science quiz online — 15 medium-level questions and answers on biology, chemistry, and physics.
1. 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.
2. Which part of the brain primarily controls balance and coordination?
💡 The cerebellum coordinates muscle movements and helps maintain balance and posture.
3. 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.
4. 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.
5. 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.
6. What is the atomic number of carbon?
💡 Carbon has an atomic number of 6, meaning it has 6 protons in its nucleus.
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 powerhouse of the cell responsible for producing ATP?
💡 Mitochondria generate ATP through cellular respiration, powering most of the cell's activities.
9. 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.
10. 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.
11. What is the chemical formula for methane?
💡 Methane, a simple hydrocarbon and greenhouse gas, has the chemical formula CH4.
12. 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.
13. 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.
14. Which cell organelle contains the cell's genetic material?
💡 The nucleus houses the cell's DNA, controlling gene expression and cell activities.
15. 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.