Unit 3 - Lesson 8 - Reconstructing Earth's History

Roughly how old is the Earth?

• 4.5 billion years old

• 4.5 million years old

• 250 thousand years old

• 10 million years old

Tags

NGSS.MS-ESS1-4

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

• The fossils were never there in the first place
• The fossils were buried too deep to be found
• The species represented by the fossils likely all went extinct

• The fossils were destroyed by natural disasters

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Mass extinctions are used to mark the end of one __________ and the beginning of another.

• geological era
• historical event
• scientific theory
• geological time period

Tags

NGSS.MS-ESS1-4

Which of the following is the shortest unit of geologic time period?

• eon

• period

• epoch

• era

What era do we live in?

• Cenezoic

• Mesozoic

• Paleozoic

• Core 4

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

• Abundant fossil records and evolution of complex life forms during the Phanerozoic eon make it easier for scientists to study and gather information.
• The Phanerozoic eon is the longest eon in Earth's history, allowing for more time to gather information.
• Scientists have not been able to study other eons as thoroughly as the Phanerozoic eon.
• The Phanerozoic eon is the only eon that contains relevant information for scientific research.

Tags

NGSS.MS-LS4-1

Scientists mostly agree that the solar system formed in accordance with the _________.

• creationism
• flat earth theory
• nebular hypothesis
• big bang theory

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

• in the Jurassic period
• after the extinction of dinosaurs
• at the same time as the earth

• during the Ice Age

Tags

NGSS.HS-ESS1-6

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

• Light, light
• Heavy, heavy
• Light, heavier
• Heavy, lighter

What does the Iron Catastrophe refer to?

• A type of iron deficiency in humans
• Separation of iron to the core of the Earth in the early solar system
• A cooking technique involving iron pots
• A famous iron sculpture

Tags

NGSS.MS-ESS2-2