Chap 15 (part 1)

Question 1

When was earth said to be created

Answer 1

4.6 billion years ago

Question 2

Archaean eon

Answer 2

First eon, lasted about 4 billion years

Question 3

Proterozoic eon

Answer 3

Second eon, lasted about 4 billion years

Question 4

Phanerozoic eon

Answer 4

Last/current eon. Includes last half billion years.

Question 5

Prokaryotes

Answer 5

Lived alone on earth for 1.5 billion years. First life

Question 6

3.5 billion years

Answer 6

First life

Question 7

Prokaryotic photosynthesis produced ______ that enriched water and atmosphere of earth

Answer 7

Oxygen

Question 8

Oldest fossil of eukaryotes

Answer 8

2.1 billion years ago

Question 9

Multicellular eukaryotes

Answer 9

1.5 billion years ago

Question 10

First multicellular plants and fungi

Answer 10

500 million years ago

Question 11

Humans originated

Answer 11

195,000 years ago

Question 12

Geological record

Answer 12

Based on sequence & age of fossils in the rock srata

Question 13

Boundaries between eras are marked by

Answer 13

Mass extinction

Question 14

Radio metric dating

Answer 14

Measures the decay of radioactive isotopes

Question 15

The rate of decay is expressed by ________. Time required for 50% it an isotope in a sample to decay.

Answer 15

Half life

Question 16

Plate tectonic theroy

Answer 16

Earths crust is divided into giant irregularly shaped plates

Question 17

Pangea

Answer 17

Super continent, brought together by plate movements

Question 18

During Mesozoic era _____ ______ _____

Answer 18

Pangaea broke apart

Question 19

Mass extinction

Answer 19

Episode of great species loss

Question 20

Extinction

Answer 20

Clearing of one SPECIES

Question 21

___ mass extinctions have occurred

Answer 21

5

Question 22

Cretaceous mass extinction

Answer 22

Caused extinction of Dino. (Except birds)

Caused by large astroid

Question 23

Adaptive radiations

Answer 23

Periods of evolutionary change

Question 24

Macroevolution

Answer 24

The broad pattern of changes in the earth.

Question 25

Gondwana

Answer 25

Southern land mass formed when Pangea broke apart

Question 26

Humans

Answer 26

May cause a sixth major extinction

Question 27

Lungfish

Answer 27

Animals that evolved when Pangea broke apart

Question 28

Wings, rigid stems, pollination

Answer 28

New adaptations that led to adaptive radiations

Question 29

May have caused Permain mass extinction

Answer 29

Super volcanos

Question 30

Plate

Answer 30

Any large moving segment of earths crust

Question 31

Fault

Answer 31

"Fallout" from astroid impact

Question 32

Himalayas

Answer 32

Formed by collision of Indian and Eurasian plates

Question 33

Continental drift

Answer 33

Movements of continents over Earths surface

Question 34

Cretaceous

Answer 34

Mass extinction caused by astroid impact

Question 35

Laurasia

Answer 35

Northern land mass formed when Pangea broke apart

Question 36

Many marsupials survived and evolved here, isolated from other countries

Answer 36

Australia

Question 37

Tsunamis

Answer 37

Caused by earthquakes under the sea

Question 38

Iridium

Answer 38

Where most important geological processes occurs

Question 39

New supercontinent

Answer 39

Predicted to form 250 million years in the future

Question 40

Yucatan

Answer 40

Sight of crater that perhaps is related to the Cretaceous mass extinction

Question 41

Underwater dramatic adaptive radiation after the Cretaceous extinction

Answer 41

Mammals

Question 42

Earthquakes

Answer 42

Movement resulting from forces at plate edges

Question 43

Plate edges

Answer 43

Place where plates side along one another

Question 44

Eurasia

Answer 44

Continent formed from the eastern part of Laurasia

Question 45

Permian

Answer 45

Mass extinction that occurred 250 million years ago

Question 46

Mantle

Answer 46

Hot layer that lies beneath the crust