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The Plastispher? Basic

Plastic trash has created a habitat for microbes. Scientists are trying to find out if this is good or bad for the oceans.

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The Petrified Fores? Basic

The Petrified Forest, Arizona contains fossils of nine extinct tree species and fossils created by other processes.

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The Pacific Ring of Fir? Basic

Most volcanoes and earthquakes take place around the Pacific Ocean basin where convergent and transform plate boundaries are making the Pacific Ocean smaller.

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The Not-So-Rare Earth Element? Basic

Rare earth elements are difficult to extract and refine. Although most of them currently come from China, they are essential for the goods we take for granted in the modern world.

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The Mystery of the Singing Sand? Basic

Using scientific method to test hypotheses about musical sand dunes.

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The Mystery of the Sailing Stone? Basic

Using scientific method to ask and answer questions about moving rocks.

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The Music of Lif? Basic

Evolution has created millions of species, all unique. This has resulted in the tremendous biodiversity we see on Earth.

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The More Things Chang? Basic

Miniscule changes over enormous periods of time will lead to remarkable differences in Earth and its environment.

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The Moon Illusio? Basic

The moon appears much larger on the horizon than it does high in the sky. The reason has perplexed people for millennia.

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The Methuselah Sta? Basic

The oldest star in that we see in the Milky Way Galaxy formed not long after the Big Bang.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

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