RISE Science Grade 5 Practice Questions - RISE Science - Grade 5 Exam

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A science class places four spoons made of different materials—copper, stainless steel, wood, and plastic—into a bowl of hot water (80°C). A dab of butter with a bead is placed on the top end of each spoon outside the water. The bead on the copper spoon falls off first. Why?

Copper absorbs cold air from the room faster than other materials. Copper is a superior thermal conductor that transfers heat rapidly from the hot water to the butter. Wood and plastic create heat energy inside the spoon handle that counteracts the water. Copper attracts butter molecules through magnetic forces.

Correct Answer:

Copper is a superior thermal conductor that transfers heat rapidly from the hot water to the butter.

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