EES Bell Work 3/26

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

Which statement correctly describes the relative ages of the rock layers shown in the diagram?

• 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

An undisturbed rock geologic column has a fossil of a reptile species in the lowest rock layer, an index fossil that was present 1 million years ago in the middle rock layer, and a fossil of a clam species in the topmost rock layer. Which conclusion is most likely correct?

• The clam species is older than one million years old.

• The reptile species is older than one million years old.

• The index fossil is older than the reptile species fossil.

• The clam species fossil is older than the reptile species fossil.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Which are scientists most likely to use to estimate the age of Earth?

• rock layers

• soil samples

• organic fossils

• water samples

Tags

NGSS.MS-ESS1-4

Which best describes the relationship between rock layers and index fossils?

• Different rock layers contain only specific species of index fossils.

• Different rock layers can be compared to determine the exact age of index fossils.

• Different rock layers can be determined to be the same exact age if they contain the same index fossils.

• Different rock layers can be determined to be the same relative age if they contain the same index fossils.

Scientists find dinosaur fossils in the bottom rock layers of a cliff and mammal fossils in the middle rock layer of the cliff. Which could best be concluded from this evidence?

• Dinosaurs ate plants.

• Dinosaurs were eaten by the mammals.

• Dinosaurs lived on Earth before the mammals.

• Dinosaurs and mammals lived at the same time.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1