Which of the following was not present in early Earth?

• Carbon Dioxide

• Nitrogen Gas

• Oxygen

• Water Vapor

Tags

NGSS.HS-ESS1-6

Scientist think the Earth is ___ years old.

• 4,500

• 45,000

• 4.5 million

• 4.6 billion

Tags

NGSS.MS-ESS1-4

Which type of life dominates the Precambrian Time?

• Dinosaurs
• Mammals
• Bacteria
• Humans

Tags

NGSS.MS-LS4-1

What percent of Earth's existence occurred during Precambrian time?

• ~ 25%

• ~ 80%

• ~ 99%

• ~ 12%

Tags

NGSS.MS-ESS1-4

In which era did the oceans and atmosphere form?

• Paleozoic
• Cenozoic
• Precambrian
• Mesozoic

How did the oceans form on Earth?

• evaporation, condensation, and precipitation of water from a meteorite

• Meteorite showered down water from outer space

• Water emerged out of the mantle

How did the atmosphere form during the Precambrian?

• Meteors and volcanoes releasing gasses

• Meteorites and volcanoes releasing gasses

• Meteorites sucking in gasses

Masses of cyanobacteria created WHAT organism during the Precambrian Era

• mammals

• stromatolites

• dinosaurs

• reptiles

Bacteria in the precambrian began photosynthesizing to create?

• sulfur

• iron

• oxygen

• nitrogen

Tags

NGSS.MS-LS1-6

Due to the condensation of gasses in the atmosphere, the Earth's temperature began to...?

• increase

• decrease

• stay the same

Tags

NGSS.HS-ESS2-4

NGSS.HS-ESS3-5