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

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A student tests four classroom objects using a circuit with a battery and a light bulb to see which materials conduct electricity. The results are shown below: • Copper paperclip: Light bulb shines brightly • Wooden ruler: Light bulb stays off • Plastic straw: Light bulb stays off • Steel washer: Light bulb shines brightly What conclusion is best supported by these data?

All solid objects allow electrical energy to flow through them easily. Metals like copper and steel are electrical conductors, while wood and plastic are electrical insulators. Non-metallic objects conduct electricity only when connected to large batteries. Plastic and wood conduct thermal energy but cannot be tested for electricity.

Correct Answer:

Metals like copper and steel are electrical conductors, while wood and plastic are electrical insulators.

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