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This is an activity that models the operation of a seismograph, a tool used to measure the size of earthquakes.

Based of the The Tech Challenge 2015, learners will engage in two mini-design challenges related to seismic engineering.

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

Learners investigate the concept of humidity by using a dry and wet sponge as a model. They determine a model for 100% humidity, a sponge saturated with water.

In a class demonstration, learners observe a simple water cycle model to better understand its role in pollutant transport.

In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.

In this activity (page 1 of the PDF under SciGirls Activity: Bogs), learners will test cups full of potting soil, sand, and sphagnum moss to see which earth material is able to soak up the most water.