Question

1. a rug sits in a sunny place on the floor for a long time. kiara thinks that light from the sun can cause the rug’s color to fade over time. can light from the sun cause the rug’s color to fade?

no. light can only change things by warming them up, so it cannot cause the rug’s color to fade
yes. the rug can take in energy from the light, causing the rug’s color to fade.
yes. light from the sun can pull energy out of the rug, causing the rug’s color to fade
no. light is not a physical thing, so it cannot change physical things like rugs.

1. malachi uses some glue to fix a broken plate. he puts the glue under a desk lamp but the glue doesn’t dry. then he puts the glue out in the sun and it dries. why does light from the sun dry the glue when light from the desk lamp does not?

because light from the sun pulls energy out of the glue and light from the desk lamp does not
because the sun gives off a type of light that carries energy, and light from the desk lamp does not
because the glue can take in energy from the light from the sun but not from the light from the lamp
because light from the sun carries heat molecules, and light from the desk lamp does not

Explanation:

• For the first question: Light from the sun carries energy. When a rug is exposed to sunlight for a long time, the rug can absorb energy from the light. This energy can cause chemical changes in the rug's dyes, leading to color fading.
• For the second question: Both the sun's light and the desk - lamp's light carry energy. However, the glue can absorb energy from the sun's light (which has the right characteristics for the glue's drying process, such as the appropriate wavelength and intensity of light - energy interaction) but not from the desk - lamp's light (maybe the desk - lamp's light doesn't have the right combination of energy characteristics for the glue to undergo the drying reaction).

Answer:

1. Yes. The rug can take in energy from the light, causing the rug's color to fade.
2. Because the glue can take in energy from the light from the sun but not from the light from the lamp.