9781422287903

WORDS TO UNDERSTAND bacteria: Tiny organisms too small to see. Some bacteria can make you sick, but others help to keep your healthy! carbohydrates: The main kind of molecule our body uses for energy. Carbohydrates can be simple, like in sugar, or complex, like in bread and pasta. consequences: The results of something. They’re often negative. digestive system: The parts of your body that work together to break down food. nervous system: The cells that carry messages from your brain to your body and back again. viruses: Like bacteria, viruses are too small to see, and they can make you sick—but they aren’t really alive.

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