Earth History Eras

The diagram shows different layers of sedimentary rock. Each layer is labeled with a letter.

• The left part of Layer B is younger than the right part.

• The left part of Layer F is the same age as Layer M.

• Layer R is older than Layer M

• Layer I is older than Layer B

Tags

NGSS.MS-ESS1-4

The geologic map below shows several rock formations exposed when a road is cut through a hillside.

Which formation in this geological map is youngest?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-ESS1-4

A fossil discovered in Colorado dates from the early Mesozoic era. A year later a similar fossil is found in Wyoming that also dates from the early Mesozoic era. These two organisms most likely lived in

• the same environment at about the same time.

• the same environment at different times.

• different environments at about the same time.

• different environments at different times.

Tags

NGSS.MS-LS4-1

Which of these provides the BEST evidence that the distribution of Earth’s oceans has changed over time?

• hot spots on ocean floors

• seismic activity along plate boundaries

• sediment buildup on continental slope

• marine fossils found on land masses

Tags

NGSS.MS-ESS2-3

Scientists estimate that if index fossils were deposited during a certain time frame, then the entire rock layer was also deposited at the same time.

A scientist finds Trophite fossils. According to the chart above, in what era and period was this rock layer deposited?

• Cenozoic era; Tertiary period

• Mesozoic era; Triassic period

• Paleozoic era; Permian period

• Paleozoic era; Mississippian period

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Which method would be BEST for scientists to use to determine the absolute age of a Precambrian igneous rock?

• Index fossils

• law of superosition

• radiometric dating

• law of original horizontality

A teacher gave students this diagram of rock layers. The teacher directed the students to determine the relative age of each rock layer based only on the information presented in the diagram.

Which method can BEST be used by the students to determine the relative age of these layers?

• radiometric dating

• rock type evaluation

• the law of superposition

• principle of uniformitarianism

Tags

NGSS.MS-ESS1-4

Which environmental condition MOST likely existed at the time a fossil formed?

• Organism remains were deposited in an area of open space

• Organism remains were covered by lava flow.

• Organism remains were buried with little oxygen.

• Organism remains were buried in an area where a lot of erosion occurred.

Tags

NGSS.MS-LS4-1

Certain fossils can be used to help determine the age of the rock layer in which the fossils are found. Which type of fossil is BEST to use when making this determination?

• marine mammal fossil

• swamp fern fossil

• trace fossil

• index fossil

Use this geologic profile to answer the following question.

Which of the following BEST describes the fossil at Point 3 when compared with the fossils at Points 1 and 2?

• The fossil at Point 3 is less common

• The fossil at Point 3 is smaller.

• The fossil at Point 3 is older.

• The fossil at Point 3 is more complex

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1