Earth History Mastery check #2 & retakes #1 & 2 (resource)

Which of the following layers is most likely the oldest?

• V

• H

• Y

• C

According to the picture below, what is the correct order from oldest layer to youngest layer?

• D, E, F, G

• E, F,G, D

• G, F, E, D

• G, F, D, E

The ______ Time Scale below shows the events, in order, of Earth's History.

• Geologic

• Superpositioned

• Relative

• Cross-cut

Which layer below is the youngest?

• A

• B

• C

• D

states that younger rock is found above older rock when comparing undisturbed sedimentary rock layers

• law of superposition

• trace fossil

• matter can't be created or destroyed

• atoms

Fossils can tell us

• what color dinosaurs were.

• how the earth has changed over time.

• how dinosaurs became extinct.

• what sounds a dinosaur made.

The index fossil of a type of trilobite is discovered in layer A of a set of rock layers found at three different sites of a field investigation. Which conclusion can be made about the rocks in layer A at all three sites?

• The rocks are all different ages
• The rocks are all about the same age
• The rocks were formed from melting magma
• The rocks were formed during a catastrophic event

Take a look at the layers below. Which letter would be the fault?

• A

• B

• C

• D

• E

Which characteristic of carbon-14 dating helps scientists determine the approximate time a species became extinct?

• Carbon-14 is not present in more recent fossils
• Carbon-14 increases at a constant rate over time
• Carbon-14 decreases at a constant rate over time
• Carbon-14 can only be found in fossils of a certain period

Two students are exploring a creek in their neighborhood. The students hope to find some fossils along the way. What kinds of rocks should the students look for on their hike, and why should they look for those kinds of rocks?

• The students should look for igneous rock. This is the rock that comes from volcanoes and is melting hot. Fossils can form in the hot magma without burning up.

• They should look for metamorphic rock. These are the hardest rocks that have been under the most pressure for the longest amounts of time. Clearly the fossils will not have been crushes or ruined but preserved.

• The students should look for sedimentary rocks like shale, limestone, and sandstone. Fossils form when they are quickly covered by sediments in a basin.

• Fossils will not form in any of these types of rock. Fossils form in Fragile Rock.