GTS overview

The entire history of the Earth can be divided into the Precambrian (ancient) Eon and the Phanerozoic (current) Eon. Which of the following correctly represents the percent of Earth's history occupied by each?

• 88% Precambrian, 12% Phanerozoic

• 12% Precambrian, 88% Phanerozoic

• 81% Precambrian, 19% Phanerozoic

• 19% Precambrian, 81% Phanerozoic

Tags

NGSS.MS-ESS1-4

Which of the following events occurred in the first 30 million years of the Earth life?

• rapid separation of internal compositional layers of mantle and core

• development of land animals

• formation of an oxygen-nitrogen atmosphere

• human accentuation of climate change

All life on Earth is:

• cellular.

• bacterial.

• aerobic.

• photosynthetic.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

All life on Earth is:

• cellular.

• bacterial.

• aerobic.

• photosynthetic.

Tags

NGSS.MS-LS1-1

Earth’s most primitive life forms are represented by:

• prokaryotic cells.

• plants.

• fungi.

• tube worms.

Tags

NGSS.MS-LS1-1

When did fossils become much more abundant in rocks, and what is the importance of this increase in fossils?

• Fossils became much more abundant in the last 542 million years of geologic time. The presence of fossils allows geologists to further subdivide the eon into three shorter eras.

• Fossils became much more abundant when the Earth was about 30 million years old. At this point the Earth was solidified into rocks that could contain the fossils.

• Fossils became much more abundant during the breakup of Pangaea, which began about 200 million years ago. After this, Earth scientists could study fossils across oceans.

• Fossils became much more abundant after the dinosaurs became extinct, because more animals lived to create fossils.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

What is the leading cause of mass extinctions of life on Earth?

• Mass extinctions are most commonly caused by a dramatic change in some part of the earth system that affects key populations of organisms.

• Mass extinctions are most commonly by the shock wave from the collision of a comet or meteoroid with the Earth.

• Mass extinctions are most commonly by radiation poisoning from the Sun's solar winds.

• Mass extinctions are most commonly by floods that cover all of the land masses on the planet.

Tags

NGSS.HS-LS4-5

Anything that occurred here on Earth more than 542 million years ago occurred during which Eon?

• the Precambrian

• the Phanerozoic

• the Proterozoic

• the Jurassic

Tags

NGSS.MS-ESS1-4

Which period are we currently in?

• Quaternary
• Holocene
• Jurassic
• Tertiary

Tags

NGSS.MS-ESS1-4

How old do Paleontologists believe the Earth is?

• 2015 years old
• 3.6 billion years old
• 4.6 billion years old
• 4.6 million years old

Tags

NGSS.HS-ESS1-6