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Scott Foresman Science Grade 6Español Red Light, Green LightUse with pages B132-B139
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Honk! You hear the screech of tires!

It's rush hour on a busy street, and the traffic lights are doing their job. Anyone who drives in traffic or walks along a city street knows that red means stop, and green means go.

When you look at a traffic signal, how do you see the colors red and green?

Cross Curriculum Unit D
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