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Take this intermediate science test online with 15 medium-difficulty questions covering biology, chemistry and Earth science.
1. What unit is used to measure electrical resistance?
💡 Electrical resistance is measured in ohms, named after physicist Georg Ohm.
2. Which planet has a day that is longer than its own year?
💡 Venus rotates so slowly that a single day there is longer than the time it takes to orbit the sun.
3. What is the chemical symbol for iron?
💡 Iron's chemical symbol, Fe, comes from its Latin name 'ferrum'.
4. Which planet has an extreme greenhouse effect that makes it the hottest planet in the solar system?
💡 Venus's thick carbon dioxide atmosphere traps heat, making its surface hotter than Mercury's despite being farther from the Sun.
5. Which gas is the most significant contributor to the greenhouse effect?
💡 Carbon dioxide traps heat in the atmosphere, making it a major driver of the greenhouse effect and climate change.
6. Which layer of the Earth is primarily composed of semi-molten rock?
💡 The mantle consists of hot, semi-solid rock that flows slowly, driving processes like plate tectonics.
7. What is the process by which the body converts food into usable energy called?
💡 Metabolism encompasses all chemical processes, including digestion and respiration, that convert food into energy.
8. Which type of rock is formed when magma or lava cools and solidifies?
💡 Igneous rock forms when molten rock, either magma below the surface or lava above it, cools and hardens.
9. What is the term for organisms that produce their own food, typically through photosynthesis?
💡 Producers, such as plants and algae, generate their own energy using sunlight, forming the base of most food chains.
10. What is the chemical formula for table sugar, sucrose?
💡 Sucrose, common table sugar, has the chemical formula C12H22O11.
11. What is the main function of white blood cells in the body?
💡 White blood cells are key components of the immune system, defending against pathogens and infection.
12. Which scientist developed the theory of general relativity?
💡 Albert Einstein published his theory of general relativity in 1915, transforming our understanding of gravity.
13. What is the scientific study of heredity and genes called?
💡 Genetics is the branch of biology that studies how traits are passed from parents to offspring through genes.
14. What is the process by which plants lose water vapor through their leaves called?
💡 Transpiration is the evaporation of water from plant leaves, helping draw water up from the roots.
15. Which subatomic particle carries a negative electric charge?
💡 Electrons carry a negative charge and orbit the positively charged nucleus of an atom.