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Since the Industrial Revolution, atmospheric carbon dioxide concentration has risen from ~280ppm (parts per million by volume) to ~390ppm in 2010. The rate of increase for the last decade (2001-2010) has been 2.04ppm/yr, more than double the rate... (View More)

In this problem-based learning activity, learners explore the significance of sunspots on the Earth's climate. Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. During... (View More)

In this problem-based learning unit, learners explore the possibilities of sustainable energy, and engage in a project to provide electricity for their city using alternative energy sources. Instructions to access NASA data are provided along with... (View More)

Temperature increases associated with global climate change have led to concerns that infectious diseases common in warmer tropical and subtropical climates may become more common in warming middle altitudes. In this problem-based learning module,... (View More)

In this problem-based learning module, learners study phytoplankton blooms along the U.S. coast. Phytoplankton form the basis of the marine food web, regulate carbon in the atmosphere, and are responsible for half of the photosynthesis that takes... (View More)

In this problem-based learning activity, learners investigate impact of sulfur dioxide on the environment. Sulfur dioxide comes from both human activities and natural sources. Burning coal and other fossil fuels is the largest source of sulfur... (View More)

This is a unit in 11 sessions about the solar system. Learners will explore the terms planet and moon, they will sort and classify various solar system bodies into categories, and use this context to discuss if Pluto is a planet. They will also... (View More)

Audience: Middle school

This is a unit in 7-8 sessions about objects outside of our solar system, including galaxies and the universe. Learners will investigate the contents of the universe, why light years are used to measure distances in space, the lifespan of a star,... (View More)

Audience: Middle school

Learners will investigate the reason for seasons on Earth. They will look at the circular orbit of Earth, year-long temperature and daylight hours across different latitudes, compare models of the Earth with and without tilt, investigate angle and... (View More)

Audience: Middle school

Learners will construct a model to show the relative size and scale of the Sun-Earth system, investigate the visible and electromagnetic spectrums, discuss solar flares and solar weather, develop a UV shield, and discuss the results of their... (View More)

Audience: Middle school
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