Ch 2 #1 The Formation of Earth

It is difficult to explain the formation of Earth because:

• it occurred quickly

• there were no human observers

• it happened recently

• animals were present

Tags

NGSS.HS-ESS1-6

As recently as 200 years ago, most scientists hypothesized Earth to be how old?

• several billion years

• a few years

• 20 billion years

• several thousand years

What happens to the age of rocks as you go lower in the Grand Canyon?

• the older rocks are in the bottom layers

• the younger rocks are in the bottom layers

• all layers of rocks are the same age

Tags

NGSS.HS-ESS1-5

What do we call a cloud of gas, dust, and matter that is floating in space?

• planet

• asteroid

• nebula

• atmosphere

The nebular theory explains the formation of:

• our sun and planets in our solar system

• our galaxy

• our universe

• all the stars in the sky

Tags

NGSS.HS-ESS1-6

What is believed to have happened to a nearby star, setting in motion the formation of the solar system out of a nebula?

• star froze

• star exploded into a supernova

• star split in two

• star became a planet eater and roamed the universe

About how old is Earth?

• 4 thousand years old

• 4.6 million years old

• 4.6 billion years old

• 406 trillion years old

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS1-6

Describe conditions on Earth 4.6 billion years ago:

• Frozen ball of ice

• Like Florida, a nice warm place to visit

• Sizzling temperatures with no breathable air

• Exactly like the Earth is today

Tags

NGSS.HS-ESS1-6

What best describes Earth 4.6 billion years ago

• cool and pleasant

• wet

• temperate

• extremely hot and hostile

Tags

NGSS.HS-ESS1-6

Describe the center of the planet Earth

• Very hot

• Room temperature

• Cold

• Frozen

Tags

NGSS.HS-ESS2-3