Demonstrating solar energy with black paper in glass jars helps second graders understand which concept?

• A. The way dark surfaces absorb light and heat air.
• B. The role of the earth's surface in transforming sunlight into infrared energy that warms the atmosphere.
• C. How glass blocks all solar radiation.
• D. Why white paper reflects sunlight.

Answer: (B)

Sunlight is energy from the sun that Earth absorbs. Dark materials, like black paper, are especially good at soaking up light and turning it into heat. In the jar activity, the black paper warms the air around it, showing how energy moves from sunlight into heat near a surface. That warmth is a hint of the bigger process: the Earth’s surface transforms sunlight into infrared energy, which then warms the air in the lower atmosphere. The demonstration makes that link clear for kids—that heat comes from the sun through the surface and ends up warming the surrounding air by infrared energy.