CCS Earth History 8.E.2 CFA

How do scientists know that some mountains were once at the bottom of an ocean?

• Freshwater rivers flow to the ocean.

• Saltwater fish are found in some mountain streams.

• Dinosaur bones have been discovered in the mountains.

• Marine fossils have been found on the peaks of some mountains.

Tags

NGSS.MS-ESS2-3

Which best describes how ice cores are important to the study of geologic history?

• They show unconformities, which signal changes in deposition.

• They hold index fossils, which are used to date the different ice cores.

• They contain evidence showing changes in the atmospheric composition over time.

• They follow the Law of Superposition, which gives reasons for extinctions of species.

Tags

NGSS.HS-ESS3-5

Which statement best describes the Law of Superposition?

• Each sedimentary layer of rock represents 1,000 years of Earth’s age, much like the rings of a tree.

• In undisturbed layers of sedimentary rock, the upper rock layers are older than the lower rock layers.

• In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.

• Rocks that form near volcanoes are older than surrounding rock.

Tags

NGSS.MS-ESS1-4

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

A scientist finds the bones of a dinosaur. What could help the scientist determine the approximate age of the dinosaur bones?

• the birds living in the area of the bones

• the weather conditions in the area of the bones

• the kinds of trees living in the area of the bones

• the index fossils in the area of the bones

What do earthquakes tell scientists about the history of the planet?

• Earth’s climate is constantly changing.

• The continents of Earth are continually moving.

• Dinosaurs became extinct about 65 million years ago.

• The oceans are much deeper today than millions years ago.

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

Radioactive dating is used to study which element in igneous and metamorphic rocks?

• calcium

• krypton

• uranium

• magnesium

Tags

NGSS.HS-PS1-8

What can be used to determine the exact age of a rock specimen?

• ice cores

• index fossils

• radioactive dating

• transitional fossils

Which is most likely to provide information about the Earth’s past climates?

• ice cores

• volcanoes

• plant fossils

• animal fossils

Which type of rock replaces bone and other hard organic materials to create rock molds of fossils?

• metamorphic

• sedimentary

• extrusive igneous

• intrusive igneous