Earth's Past

Which method is most appropriate for finding the age of the earth in years?

• radiometric dating

• asolute dating

• atomic number counting

• mass number counting

Tags

NGSS.HS-ESS1-6

NGSS.HS-PS1-8

The age of the Canyon Diablo meteorite was determined by using the half-life of _____.

• carbon-14

• hydrogen-3

• uranium-235

• potassium-40

Tags

NGSS.HS-PS1-8

About how long ago did oxygen begin to accumulate in earth’s atmosphere?

• 2 billion years ago

• 20 million years ago

• 2 million years ago

• 0.2 million years ago

Tags

NGSS.MS-LS1-6

How did stromatolites contribute oxygen to the early atmosphere?

• by weathering of rocks

• through photolysis

• through photosynthesis

• through methane degradation

Tags

NGSS.MS-LS1-6

Which of the following is a type of rock formation created by tectonic uplift and subsequent weathering?

• mesa

• horn

• alcove

• stack

Tags

NGSS.MS-ESS2-2

Which of the following is an example of a glacial formation?

• mesa

• horn

• arch

• butte

_____ occurs when an ice sheet scours and wears away at the underlying rock, gradually wearing it down over time.

• Plucking

• Abrasion

• Volcanism

• Gravitation

_____ occurs when the chunks of rock become bonded to the ice sheet, so that when the ice sheet moves it carries the chunks of rock with it.

• Plucking

• Abrasion

• Volcanism

• Gravitation

A distinct formation is formed when both of the abrasion and plucking wear away a rock body.

• horn

• arete

• stack

• alcove

Tags

NGSS.MS-ESS2-2

An isolated flat-topped hill with steep sides, fairly lage, found in landscapes with horizontal strata is a _____.

• mesa

• arete

• stack

• alcove