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15 science questions and answers for beginners covering biology, chemistry and everyday science facts.
1. Which gas do plants release into the air during photosynthesis?
💡 As plants photosynthesize, they release oxygen as a byproduct, which most living things depend on.
2. A see-saw is a simple example of which type of machine?
💡 A see-saw works as a lever, pivoting around a fixed point called a fulcrum.
3. What do we call a baby frog?
💡 Baby frogs, called tadpoles, live in water and breathe through gills before developing lungs and legs.
4. Which instrument is used to measure temperature?
💡 A thermometer measures temperature, often using the expansion of mercury or digital sensors.
5. What do we call the process of water turning into vapor?
💡 Evaporation occurs when liquid water absorbs enough heat energy to turn into water vapor.
6. What is the powerhouse of the cell called?
💡 Mitochondria produce ATP, the energy currency that powers most cellular activities.
7. How many chambers does the human heart have?
💡 The human heart has four chambers: two atria and two ventricles.
8. What is the largest organ in the human body?
💡 The skin is the body's largest organ, protecting internal structures and regulating temperature.
9. What do bees mainly collect from flowers?
💡 Bees collect nectar from flowers and convert it into honey inside their hives.
10. How many planets are there in our solar system?
💡 There are 8 planets in our solar system, following the reclassification of Pluto as a dwarf planet in 2006.
11. Which state of matter has both a fixed shape and a fixed volume?
💡 A solid holds its shape and volume because its particles are tightly packed and don't move freely.
12. Which natural satellite orbits the Earth?
💡 The Moon is Earth's only natural satellite, orbiting our planet roughly every 27.3 days.
13. What do we call animals that eat only plants?
💡 Herbivores, like cows and rabbits, eat only plant material for energy and nutrients.
14. Which organ helps us breathe by taking in oxygen and releasing carbon dioxide?
💡 The lungs exchange oxygen and carbon dioxide between the air we breathe and our bloodstream.
15. What is the most abundant gas in the air we breathe?
💡 Nitrogen makes up about 78% of Earth's atmosphere, far more than oxygen's 21%.