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Doctors often send a sample of blood to a lab, to make sure their patients are healthy.

In this activity, learners explore how eating unhealthy food can damage a heart and arteries.

Many germs spread by our hands, and often times, people don't wash their hands well enough to get rid of germs.

Some bugs can walk on the surface of a lake, stream, river, pond or ocean.

En esta actividad, Mateo y Cientina enseñan a usar modelos para ver las causas de las fases lunares.