Unit 1 ES Review-NNHS

Banded iron formations started forming during which eon?

Stellar winds blew away (H) and (He) surrounding Earth - what composed Earth's atmosphere next?

This caused gases & dust to collide and build up while gravity pulled them into bigger clumps.

An object is most likely to sink in water if __________.

Earth separated into layers based on composition and density in which Eon?

The crust of the Earth is the ____ dense because it is made of _______.

Which event was significant during the mesozoic era?

Most of Earth's life existed in which Eon?

During this Eon, oxygen began building in the atmosphere:

Oil floats on water. The most accurate reason for this is __________.

Put Earth's four Eons in chronological order from oldest to youngest.

Which of the following elements is found in Earth's core?

(T) -OR- (F): The average temperature of Earth's layers decreases from the crust to the core.

What effect did stellar (solar) winds have on early planetary development?

The order of the layers from the inside of the Earth outwards is:

Which of the following is NOT a reason for the Hadean Eon being so hot?

When did the Earth begin to form?

Which gases were dominant in the Earth's early atmosphere?

What is the best description of Earth's conditions as it first formed?

Which prefix means "middle"?

What affect did oxygen in the atmosphere have on Earth's climate?

This is Earth's thinnest layer:

(T) -OR- (F): The average pressure of Earth's layers increases from the crust to the core.

Which explains why oxygen did not accumulate in the atmosphere right away?

What Era are we in currently?

Which Eon represents the largest part of Earth's history?