By Measuring the Star Formation Rate in Galaxies as a Function

question 91

Multiple Choice

By measuring the star formation rate in galaxies as a function of their redshift, we have learned that the average star formation rate in galaxies peaked approximately ________ years ago.

• A) 1 billion
• B) 3 billion
• C) 5 billion
• D) 7 billion
• E) 11 billion

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Definitions:

Viscous Lava

Lava that has a high viscosity, meaning it flows slowly due to its thick, sticky consistency.

Lateral Blast

A volcanic eruption characterized by the powerful, horizontal expulsion of ash, gas, and volcanic debris, often occurring with little to no warning.

Mount St. Helens

An active stratovolcano located in Washington State, USA, famous for its catastrophic eruption on May 18, 1980.

Steep-Sided Cone

A type of volcanic mountain with steep sides, typically formed from eruptions that deposit large amounts of volcanic material around the vent.