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In this activity, learners work in teams to study the observation skills essential to scientific research.

Learners work in teams to investigate how scientists use physical characteristics to classify living things.

In this activity, learners explore a scale by comparing objects, which look similar but have different weights. Learners predict and then measure the weights of various objects using a scale.

Each learner chews a piece of gum until it loses its flavor, and then leaves the gum to dry for several days.