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In this activity, learners investigate the different salinity levels of oceans, rivers and estuaries.

In this physics crime lab or demonstration, learners pretend they are criminologists and must find the "muzzle velocity" (speed of the bullet as it leaves the gun) of a gun used to commit a crime.

In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).

In this chemistry challenge, learners identify an unknown white powder by comparing it with common household powders.

In this activity, learners create channel features with flowing water, comparing their observations to real images of Mars and Earth taken by satellites/orbiters.

In this activity, learners explore how nanotechnology is being used to create new types of protective fabrics.

In this life science activity (page 8 of the PDF), learners explore the carbon cycle by mixing yeast, sugar and water.

In this activity, learners explore how environmental engineers might approach solving the problem of an oil spill.

Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).