Roughly how old is the Earth?

• A hundred years old

• Thousands of years old

• Millions of years old

• Billions of years old

Tags

NGSS.HS-ESS1-6

When certain fossils appear in one rock strata but disappear in the next one, what probably happened?

• A mass extinction

• The organism moved

• The organism evolved very quickly

• The environment was no longer prone to creating fossils

Tags

NGSS.MS-LS4-1

Mass extinctions are used to makr the end of one _______ and the beginning of another.

• year

• rock strata

• human era

• geologic time span

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

Which of the following is the shortest unit of time?

• eon

• era

• period

• epoch

What ero do we live in?

• Cenozoic

• Mesozoic

• Paleozoic

• Precambrian time

Tags

NGSS.MS-ESS1-4

Why do we have so much information about the current eon (Phanoerozoic) even though it only represents about 10% of the Earth's lifespan?

• Weathering was miuch worse before this eon

• There aren't many rocks left from previous eons

• The Earth didn't have a crust before Phanoerozoic

• Most of the Earth's crust was formed during this epoch

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Scientists most agree that the solar system formed in accordance with the ________.

• star theory

• big bang theory

• nebular hypothesis

• black hole hypothesis

Because meteorites formed __________, they are good direct evidence to determine the age of the Earth.

• after the Earth

• before the Earth

• at the same time as the Earth

• very recently in geologic time

During the formation of the Earth, ________ elements like iron fell to the core and _______ elements rose toward the surface.

• light; heavy

• heavy; light

• radioactive; stable

• stable; radioactive

What does the iron Catastrophe refer to?

• the iron shotage of the 1940s

• the formation of Earth's iron core

• the disruption of rock strata by iron ore

• the impact of the Canyon Diablo meteorite

Tags

NGSS.HS-ESS1-6