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Description: You probably know how to inflate a balloon with baking soda and vinegar. This challenge invites students to plan an inquiry into the ideal ration between baking soda and vinegar. Starting with familiar materials and a well known reaction, they can choose variables to modify and measure the results.

Keywords: superconference; chemical reaction; chemical change; planning and conducting; experiment design

Name	MIME Type
eix-the-soda-challenge-ppt.pptx	application/vnd.openxmlformats-officedocument.presentationml.presentation

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Description: With animation, interactivity, and sound effects, Starting with Soil demonstrates how plants and animals cooperate to make the soil we need to grow healthy food. Kids learn that soil starts with bare rock and discover how long it takes nature to make one inch of topsoil. (Spoiler alert: it takes 500 years!) Different chapters convey the importance of pollinators and the critical roles animals, the weather, microorganisms, and cover crops play in organic farming. Designed for students ages 7-9, Starting with Soil allows users to plant seeds, build a compost pile, drag a microscope over different organisms in soil to get a better look, and view the symbiosis at work when corn, beans, and squash are planted together.

Subject: Science; Biology; Chemistry; Earth Science; Environmental Science; Geography

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