Early Earth History

Approximately how old is the Earth?

• 4.5 million years old

• 4.5 billion years old

• 5 million years old

• 7 billion years old

Tags

NGSS.MS-ESS1-4

What is the most popular hypothesis of the formation of the moon?

• The moon passed very close to the earth and was caught in its gravitational pull.

• The moon formed the same time as the earth.

• The moon formed when a small planet smashed into the newly formed earth sending debris into space which formed the moon.

The first living things on Earth was:

• dinosaurs

• fish

• bacteria

• mammals

How did Earth get its water?

• From the moon

• From meteors that hit the Earth

• From the sun

Tags

NGSS.MS-ESS2-4

Where did Earth get its oxygen from?

• The water

• Living things that do photosynthesis

• From meteors that hit the Earth

Tags

NGSS.MS-LS1-6

True or False: Early Earth's atmosphere did NOT contain oxygen

• true

• false

The first living things on Earth were

• unicellular

• chemotrophs

• prokaryotes

• all of these

True or False: Scientists know how life began on Earth.

• true

• false

Which of the following describes earth as it was first forming?

• lots of volcanic activity

• frequent meteor and asteroid impacts

• no atmosphere or water

• All of the above.

After the large explosion in space, what force pulled matter and particles back together to form spheres, like the Earth and moon over time?

• gravitational force

• electrical force

• nuclear force

• Skywalker's force

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4