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[Volcanic Hazards] Yellowstone Caldera is a large volcanic system located in northwest Wyoming. It has erupted catastrophically several times in the last 18 million years with the most recent eruption, called the Lava Creek eruption, occurring approximately 630,000 years ago (0.6 Ma).Watch the video on this most recent eruption, and answer the question that follows. Yellowstone Caldera Ash from the Yellowstone eruption was dispersed as far south as the Gulf of Mexico and as far north as Canada. Use the choices below to characterize the eruption.

[Relative and Numerical Dating] In this part, you will take on the role of a scientist in which you will have to decide which techniques to employ to determine the ages of different strata. For each of the following scenarios, select the best dating technique to use.

[Earth’s Atmosphere]  Atmospheric properties, such as temperature, pressure, and relative humidity, are reported in different units. Match the unit with the atmospheric property it measures.

[Earth’s Atmosphere]  Relative humidity is an indication of how much water vapor is present in relation to the overall storage capacity of the air. For example, warm days have much higher capacity for holding water vapor than cool days. On the following image, the relative humidity levels are given for four different weather conditions. Match the weather condition with the correct beaker.

[Volcanic Hazards] Which of the following substances has higher viscosity?

[Oceans] So, sea level is rising…What does that mean for our future? From computer models, scientists have produced the following graph to help us visualize expected amounts of sea-level change. Based on the graph, categorize the following estimations as to whether they are too high, too low, or within predicted rates of sea-level rise.

[Oceans] Now let’s put this formula to use. To understand the more recent trend of sea-level rise, we have to look on the scale of decades instead of hundreds of millions of years. The following graph shows the change in sea level from 1880 to 2010. What is the approximate rate of sea-level rise during this period? What is the approximate rate of sea-level rise during this period? Remember, rate is calculated as change divided by time.

[Winds, Fronts, and Cyclones] Warm air rises above cold air at a front. This is because warm air is less dense than cold air. Along a warm front, warm air advances over a retreating cold air mass. Select the image below that represents a warm front.

[Volcanic Hazards] Based on what you know about viscosity and composition, rank the magma compositions from least explosive to most explosive. Hint: Explosivity occurs when gases are unable to escape from a thick magma, causing pressure to build up.

[Volcanic Hazards] Temperature influences the viscosity of many materials. Would you expect a high-temperature magma to be more or less viscous than a lower temperature magma?