WVGSA Grade 8 Science Practice Questions - West Virginia General Summative Assessment Grade 8 Science Exam

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An investigation tests light transmission through three materials: • Material X transmits 95% of incoming light rays • Material Y reflects 90% of incoming light rays • Material Z absorbs 92% of incoming light rays Which material should be selected to construct energy-efficient dark curtains that prevent solar heating of a room?

Material X because it lets light pass through without heat buildup Material Y because reflecting light prevents thermal energy absorption inside the room Material Z because absorbing light converts light into useful room cooling A equal mix of Material X and Material Z

Correct Answer:

Material Y because reflecting light prevents thermal energy absorption inside the room

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