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In this yummy biology activity (page 3 of the PDF), learners participate in a demonstration of natural selection.

In this activity about dinosaurs and survival, learners use scrap materials to create a miniature dinosaur habitat that includes a food source, water source, and shelter.

In this activity, learners use gumdrops and toothpicks to model the composition and molecular structure of three greenhouse gases: carbon dioxide (CO2), water vapor (H2O) and methane (CH4).

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?