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In this activity, learners investigate the process of osmosis by adding salt to a sealed bag of raw carrots and comparing it to a control.

In this activity, learners compare and contrast their own skin (including the area covered) with that of an orange.

In this hands-on science experiment, students combine their understanding of the different states of matter and the characteristics of various chemical reactions.

In this hands-on experiment, kids use chemistry to explore whether acids or bases are better at restoring a penny’s shine.

In this activity on page 7 of the PDF, learners explore how engineers characterize building materials.

In this environmental health activity, learners grow and observe bread mold and other kinds of common fungi over the course of 3-7 days.