Unit 3 LS2 Geologic Time Scale Check-In

How did Earth get it's moon?

• The Early Earth was spinning so fast, that a huge chunk broke off to become the moon

• The moon formed at the same time as Earth from dust and gas nearby

• The moon was ejected from Earth's surface by a nuclear explosion in Earth's core

• Another mars-sized planet smashed into Earth and the chunks that flew off formed the moon

Tags

NGSS.MS-ESS1-1

Where did Earth get all of its water?

• Ice asteroids and comets smashed into Earth bringing water.

• The water was there from the start when Earth first formed

• Water was trapped in icy rocks near Earth's core that melted to form oceans

• Water rained down from space for 500 million years to fill the oceans.

Tags

NGSS.MS-ESS2-4

What was the late heavy bombardment?

• This was a short period of time (~50,000 years) where comets and asteroids smashed into Earth

• This was when the dinosaurs were wiped out by an asteroid impact

• This was a long period of time (~500,000,000 years) where comets and asteroids smashed into Earth

• This was when the Allies bombed Dresden, Germany near the end of WWII

Tags

NGSS.HS-ESS1-6

The first life on Earth was...

• Eukaryotes like plankton

• bacteria

• dinosaurs

• plants

Earth's early atmosphere was made mostly of...

• oxygen

• nitrogen

• sulfur dioxide

• Carbon dioxide

The organism responsible for changing Earth's atmosphere to include more oxygen was...

• flowering plants

• seaweeds in the ocean

• cyanobacteria

• sea sponges

Tags

NGSS.MS-LS1-6

The sudden loss of a large portion of life on the planet is known as a(n)...

• life wipe

• cataclysm

• mass extinction

• asteroid impact

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

When did life really start to "explode" with variety?

• 1 billion years ago

• 3.5 billion years ago

• 20,000 years ago

• 540 million years ago

Tags

NGSS.MS-LS4-1

The last large extinction event that happened 65 million years ago to wipe out the dinosaurs most likely started with a(n)

• virus that killed most of life.

• asteroid impact near present day Mexico.

• alien invasion to make way for the mammals that would evolve to become humans.

• a massive eruption of a supervolcano.

Tags

NGSS.MS-LS4-1

True or False. Humans have been on Earth for most of its history.

Tags

NGSS.MS-LS4-1

NGSS.MS-ESS1-4