Rocks and Minerals — Test

Question 1

Assume that Sample B (subvolcanic sill) was exposed to slightly slower cooling conditions. What change in texture would most likely occur?

Revolt · Accepted Answer

Crystals would become larger, and vesicle content would decrease.

Question 2

Why does a sodium atom form a Na⁺ ion instead of Na⁻ ?

Revolt · Accepted Answer

Sodium loses one electron to achieve a stable outer shell.

Question 3

Match each process to the correct result in the rock cycle.

Revolt · Accepted Answer

breaks rock into sediments|formation of sedimentary rock|rock transforms into magma|formation of metamorphic rock

Question 4

Which explanation best describes the process that changed the rock from Redwater Gorge?

Revolt · Accepted Answer

Hydrothermal metamorphism occurred as circulating fluids transferred heat and chemicals that recrystallized minerals inside the solid rock.

Question 5

Which observation most strongly supports the conclusion that mechanical stress alone can reorganize mineral structure in solid rock without melting?

Revolt · Accepted Answer

The fine-layered sediment substrate shows planar mineral bands produced under direct pressure without the aid of heat or fluids.

Question 6

Assume geologists increased the burial rate in Region X from 1.1 mm per year to 2.0 mm per year. Which prediction best describes the effect on the time required to form metamorphic rock in Region X?

Revolt · Accepted Answer

The time would decrease, because rocks would reach the necessary depth more quickly.

Question 7

Choose the correct answer from each drop-down menu to complete the statement.

Revolt · Accepted Answer

locked inside atomic lattices|present in native form|hidden beneath surface weathering layers

Question 8

Imagine the Bitterroot Range was uplifted and erosion removed several kilometers of rock from above the transformed zone. What would most likely happen to the metamorphic rocks now exposed near the surface over time?

Revolt · Accepted Answer

The rocks would remain solid but begin to weather and break down.

Question 9

What does the constant temperature at 100°C between 0 and 2 minutes indicate?

Revolt · Accepted Answer

Energy is being released as molecules condense into liquid water.

Question 10

Choose the correct answer from each drop-down menu to complete the statements.

Revolt · Accepted Answer

hard|3D lattice|soft

Rocks and Minerals — Test Answers

More from this Course

TRY EDGENUITY HACKS