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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.

Using pipe cleaners, straws, and beads, learners explore the building blocks of life by creating their own model of DNA.

In this activity, learners create a model using metric measuring tapes and atmosphere composition data.

In this activity (on pages 20-23 of PDF), learners build a model of a power plant using simple materials.

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