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Volcanoes with violent volcanic eruptions that produce pyroclastic flows are fed by magma with a very low viscosity.

What type of depositional feature is conical, with a fan-shaped structure and forms at the base of a mountain front where a stream discharges onto a relatively flat plain?

The main strength of Alfred Wegener’s hypothesis of continental drift was the many observations indicating that the continents were joined together at some point in Earth’s past. Which of the following was a piece of evidence that Alfred Wegener used? Select all that apply.

Which of the following hypotheses can we find evidence for in the rock record to explain the extinction of the dinosaurs?

How do volcanic eruptions affect Earth’s climate? 

Where did the oxygen in Earth’s third atmosphere come from?

Which of the following is a greenhouse gas in Earth’s atmosphere? Select all that apply

COVID-19 is a mass extinction event.

The atmosphere and oceans have been warming over the past 50 years. In your own words, what is the main cause(s) of sea level rise that have resulted from climate change during this time?

Winds will flow from regions of [winds1] to regions of [winds2].