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In this technology activity, learners explore digital imaging and pixels. Learners "transmit" an image to a partner by creating an image on grid paper.

In this activity, learners build a simple pinhole viewer. They use this apparatus to project images from a variety of light sources, including a candle, the Sun, and the Moon.

In this activity, learners will build the highest tower they can out of recycled materials.

Historically, sea floor mapping (bathymetry) was done by soundings.

In this activity, learners explore sensors and focus specifically on how to measure humidity using a sensor.