8th Grade Physics and Chemistry quiz
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Why does a straight straw look bent when placed in a glass of water?
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More questions about 8th Grade Physics and Chemistry
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What falling fruit inspired Newton's idea of gravity?
Answer: Apple
Why: Newton connected the falling apple to orbital motion, realizing gravity pulls both the fruit and the Moon.
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Through which process does heat transfer via direct physical contact between particles?
Answer: Conduction
Why: Metals conduct heat rapidly because free electrons can drift freely and transfer kinetic energy across the atomic lattice.
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Which visible color has the longest wavelength?
Answer: Red
Why: Red light spans about 700 nanometers at the edge of the visible spectrum, nearly double violet's wavelength.
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What metal foil was used to discover the atomic nucleus?
Answer: Gold
Why: Because most particles passed straight through the gold foil, Rutherford concluded that atoms are mostly empty space.
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What property distinguishes velocity from speed in physics?
Answer: Direction
Why: A car driving in a circle at a steady 30 mph has constant speed, but its velocity changes continuously because its direction turns.
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Which pure metal has the highest melting point?
Answer: Tungsten
Why: Tungsten survives temperatures up to 3,422°C, which made it the ideal filament material in traditional incandescent bulbs.
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