[From Big Bang to Blue Marble] If the pressure at 40 km depth is approximately 10,000 bars, which scenario best explains this increase?

[Minerals]  Another important test is determining how many planes of cleavage a particular mineral has. Look at the mineral below. A knife was used to break the mineral into smaller fragments. How many planes of cleavage does the mineral have?

[Minerals]  Field Work Question:  One of the first tests geologists run on unknown minerals is the “luster” test. Look at the mineral below. What kind of luster does it have?

[From Big Bang to Blue Marble] Why does the geothermal gradient vary at different depths inside the Earth?

 [Minerals] When minerals cool slowly, they tend to form larger, better-developed crystals. We use the terms “euhedral,” “subhedral,” and “anhedral” to describe different levels of crystal development. Below is a cartoon rendering of the edge of an amethyst geode. Drag the labels to the correct part of the image to show where each of the different types of crystals appear to have formed.

 [Minerals] Let us look at silicates in a little more detail. Depending on a silicate mineral’s composition, the Si-O tetrahedra that make up the mineral will arrange themselves in different patterns. Drag the silicate framework name to the correct schematic on the image provided.

[From Big Bang to Blue Marble] Which of the following best explains why terrestrial planets formed closer to the Sun, while gas giants formed farther away?

[Tornadoes, Thunderstorms & Hurricanes] The map below shows the number of tornadoes per year (per 26,000 square km, for a 27-year period). Order the cities listed below based on the likelihood of their experiencing a tornado over the course of a year. Start with the least likely.

[From Big Bang to Blue Marble] Which of the following statements accurately describe processes or outcomes related to the condensation theory and Earth’s differentiation? (Select all that apply.)

[From Big Bang to Blue Marble] Which of the following scenarios best illustrates the difference between contact and field forces?