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Light
As we learned in Mission 1, energy travels to Earth from the Sun in the form of light and heat. We learned in Mission 2 that plants use sunlight to make the food it needs through the process of photosynthesis. So, plants need light in order to live.
What happens when light from the Sun hits an object? Some objects are transparent, like glass, and the light travels through them easily. Some objects, like paper, are translucent. This means that light does travel through but the path of the light is distorted. And, some objects are opaque. Light does not travel through these objects.
In the pictures below, Polly is holding up three different objects. One is transparent, one is translucent, and one is opaque. But which one is which? Click on the pictures to check your answers. |
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