Earth History Retake Prep '23

Magma that forces its way into rock and hardens is called a(n)

• intrusion

• extrusion

• fault

Which era do we live in?

• Mesozoic Era

• Cenozoic Era

• Paleozoic Era

Scientists study atmospheric conditions recorded in ice core samples from Antarctic. Data from the ice core samples show changes in the atmospheric concentration of carbon dioxide (CO2) and average global temperatures in degrees Celsius (C) over time, as shown in their graph. Which conclusion is supported by the data shown in the graph?

• A decrease in the average global temperature causes carbon dioxide in the atmosphere to stablilize

• An increase in carbon dioxide in the atmosphere corresponds to an increase in the average global tempearture

• An increase in average global temperature corresponds to a decrease in carbon dioxide in the atmosphere.

Phosphorous-33 weighs 20,000 g and has a half-life of 25 days. I was out wondering the MetaVerse when I found a fossil that contained 5,000 g of P-33 in it. How hold was that fossil?

• 25 days

• 50 days

• 75 days

Carbon-14 half-life is 5,730 years. It's beginning mass is 1,000g. If I find a fossil behind BMS that contains 250g of C-14 in it, how old is that fossil?

• 5,730 years

• 500 g

• 11,460 years

Part 1. Select the pieces of evidence that describe why these fossils are most useful in determining the relative age of rock layers.

• The fossils appear in a single layer

• The fossils appear in all but one layer

• The fossils appear in different types of rock

Part 2. Select the pieces of evidence that describe why these fossils are most useful in determining the relative age of rock layers.

• The fossils appear in different types of rock

• The fossils appear in a each geologic column

• The fossils do not appear with any other fossils in a layer.

Which fossil would be most useful in determining the relative age for rocks in these geologic columns?

• Ammonite

• Brachiopod

• Trilobite

On the Geologic Time Scale, eras are divided into

• epochs

• periods

• eons

Fossils provide evidence for all of the following except for

• how Earth originally formed

• how environments on Earth have changed over time

• how groups of organisms have changed over time