Geologic History

When is it speculated that Earth first formed?

• ~3.6 billion years ago

• ~4.6 million years ago

• ~4.6 billion years ago

• Last Saturday

Tags

NGSS.HS-ESS1-6

All of the following gases were likely abundant in Earth's early atmosphere EXCEPT

• Water (H₂O)

• Carbon monoxide (CO)

• Carbon dioxide (CO₂)

• Oxygen (O₂)

• Methane (CH₄)

Tags

NGSS.HS-ESS1-6

All of the following were present on early Earth

• Volcanic activity

• Ozone layer

• Lightning

• UV radiation

• Saltwater ocean

Tags

NGSS.HS-ESS1-6

Our first (fossilized) evidence of prokaryotes dates back to

• ~4.6 billion years ago

• ~3.5 billion years ago

• ~1.5 billion years ago

• ~250 years ago

Tags

NGSS.HS-ESS1-6

Which of the following likely developed FIRST with the most accepted proposal of the early origins of life on Earth?

• Abiotic synthesis of organic molecules

• Synthesis of proteins

• Development of a genetic code

• Evolution of cells

Which of the following likely developed SECOND with the most accepted proposal of the early origins of life on Earth?

• Abiotic synthesis of organic molecules

• Synthesis of proteins

• Development of a genetic code

• Evolution of cells

Tags

NGSS.HS-LS3-1

Which of the following likely developed THIRD with the most accepted proposal of the early origins of life on Earth?

• Abiotic synthesis of organic molecules

• Synthesis of proteins

• Development of a genetic code

• Evolution of cells

Which of the following likely developed FOURTH with the most accepted proposal of the early origins of life on Earth?

• Abiotic synthesis of organic molecules

• Synthesis of proteins

• Development of a genetic code

• Evolution of cells

Tags

NGSS.HS-LS4-2

What was the Miller-Urey experiment trying to determine?

• Whether cells evolved before or after proteins/genetic code.

• How Earth formed.

• Whether organic molecules could have formed before life was present.

• Whether DNA or RNA evolved first.

• Which came first, the chicken or the egg.

What organism is responsible for the formation of stromatolites?

• Mammals

• Cyanobacteria

• Dinosaurs

• Butterflies

Tags

NGSS.MS-LS1-6