Ch18 The History of Life on Earth

Question 1

A layer of sedimentary rock whose composition is more or less the same throughout and that is visibly different from the rock layers above and below it.

Answer 1

Strata

Question 2

The dictable pattern that radioisotopes decay in over long periods.

Answer 2

Half-life

Question 3

The use of the half-life to date fossils and rocks

Answer 3

Radiometric dating

Question 4

The assemblage of organisms in a particular area

Answer 4

Biota

Question 5

All of the plants living in an area

Answer 5

Flora

Question 6

All of an area’s animals

Answer 6

Fauna

Question 7

Best Cornerback in the game…

Answer 7

Xavier Rhodes

Question 8

Aren’t the Vikings better than the packers???

Answer 8

Short answer – Yes; Long Answer – I shouldn’t even have to explain it…

Question 9

This/these type of flora have dominated the Earth since the Cenozoic era began

Answer 9

Flowering Plants

Question 10

Multicellular life extensively diversified during this period, a prime example of an evolutionary radiation

Answer 10

Cambrian explosion (Cambrian era)

Question 11

Form of life extensively diversifies and multiplies

Answer 11

Evolutionary Radiation

Question 12

How the “precise” age of fossils and rocks is generally determined

Answer 12

Radiometric dating

Question 13

How the relative ages of rocks is generally determined in sediment deposits

Answer 13

Placement of sediment, Old=>New = Bottom=>Top