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Ocean acidification is a problem that humans will have to deal with as we release more and more carbon dioxide into the atmosphere.

In this outdoor, sunny day activity, learners experiment with paper leaf models to discover how some desert plants conserve water.

Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.

In this activity, learners create a working model of a nail clipper. This activity helps learners learn the basic principles of simple machines, engineering design and model building.

In this activity, learners explore the relative sizes and distances of objects in the solar system.