Early Earth

The Earth is approximately how many years old

• 5 billion
• 5 million
• 4 billion
• 2 billion

Tags

NGSS.HS-ESS1-6

The first evidence of life was approximately

• 3.4 billion years ago
• 2.2 billion years ago
• 3.4 million years ago
• 5 billion years ago

Tags

NGSS.MS-LS4-1

Around 2.2 billion years ago, bacteria started producing ________ by photosynthesis.

• oxygen
• nitrogen
• carbon dioxide
• iron oxide

Tags

NGSS.MS-LS1-6

The early earth formed by

• all of the above
• volcanic eruptions
• cosmic collions
• comets and asteroids

Tags

NGSS.HS-ESS1-6

The atmosphere of the early earth had a lot of

• carbon dioxide

• nitrogen

• oxygen

• carbon dioxide and water vapor

Tags

NGSS.HS-ESS1-6

There was very little __________ in the early atmosphere

• oxygen
• carbon dioxide
• water vapor
• iron

Tags

NGSS.HS-ESS1-6

What color was the sky in the early earth?

• pinkish-orange
• reddish-orange
• purple
• brown

What were the first cells in the early earth?

• prokaryotic cells
• eukaryotic cells

What made the oceans brown?

• iron
• oxygen
• nitrogen
• carbon dioxide

Tags

NGSS.HS-PS1-2

What is rust?

• iron oxide
• carbon dioxide
• nitric oxide
• silver nitrate

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5