In this "Sid the Science Kid" activity, learners make applesauce to explore irreversible change. Learners compare and contrast apples that have been changed by heat with apples that haven't been changed. This activity includes a "Sid the Science Kid" video showing how to conduct the investigation. Safety note: adult supervision required.

In this challenge, learners have to figure out in what order to combine five solutions to change the color from clear, to yellow, to blue, and back to clear. The five chemicals are potassium iodide, sodium thiosulfate, sodium hypochlorite (Clorox bleach), soluble starch (Niagara spray starch), and water. The color changes indicate chemical reactions, and the lesson includes some background information about the reactions that create different colors. Suggestions are given for guiding learners through systematic approaches to making the different combinations and observing the results, and for explaining to different age groups what happens when the solutions are combined.

All animals develop and grow over time. The animals in this video segment, however, undergo very dramatic changes on their way to adulthood -- a developmental process known as metamorphosis.

The goal of this activity is for students to learn how to tell a story in order to make a complex topic (such as global warming or ozone holes) easier for a reader to grasp. Students realize that the narrative impulse underlies even scientific and technical writing and gain a better understanding of the role of myth as a "science" of imagination that helps us to gain insight into human motivation.

In this online activity, learners see simulations of how processes shape the Earth, and see estimates of how long these processes take. Learners see a before picture and after picture and need to choose a process (e.g. wind, water, volcanoes, glaciers) and a time span (e.g. 100 years, 10,000 years, 2,000,000 years) that could be responsible for the change. Use this as an introduction to Earth's changes or as a quick review. When learners set up a free account at Kinetic City, they can answer bonus questions at the end of the activity as a quick assessment. As a larger assessment, learners can complete the Smart Attack game after they've completed several activities.