Change Over Time

Question 0

Theory of evolution

Answer 0

Gradual change in living things over time

Question 1

fossil record

Answer 1

provides evidence of the history of life on earth

Question 2

5 fossil types

Answer 2

Petrified fossils, Molds and casts, Carbon films, Trace fossils, Preserved Remains

Question 3

Petrified fossils

Answer 3

fossils in which minerals replace all or part of an organism

Question 4

Mold

Answer 4

a hollow area in sediment in the shape of an organism

Question 5

Cast

Answer 5

a copy of the shape of an organism

Question 6

Carbon films

Answer 6

an extremely thin coating of carbon, on rock

Question 7

Trace fossils

Answer 7

shapes of ancient plants and animals, usually foot prints or leaf prints in mud

Question 8

Preserved remains

Answer 8

organisms trapped and preserved in tar, ice, amber, or bogs

Question 9

Relative age

Answer 9

age compared to age of other rocks

Question 10

Absolute age

Answer 10

actual age of the rock

Question 11

Law of supersition

Answer 11

in horizontal rock layers, oldest rocks on the bottom

Question 12

Extrusion

Answer 12

lava that hardens on the surface

Question 13

The rock below the extrusion is always ____________ than the extrusion

Answer 13

Older

Question 14

Intrusion

Answer 14

Magma that pushes into rock and cools

Question 15

Intrusions are always ___________ than the layers it pushes through

Answer 15

Younger

Question 16

Uncomformity

Answer 16

A gap in the geological record

Question 17

Index fossils

Answer 17

Fossils used to help date rock layers

Question 18

Radioactive decay

Answer 18

when an element releases energy and changes from one element to another

Question 19

Half life

Answer 19

the time it takes for one half life of an element

Question 20

Radioactive dating

Answer 20

used to find thge absolute age of rocks

Question 21

Carbon 14 dating

Answer 21

used to date plants and animals

Question 22

Geological time scale

Answer 22

a record of life forms and geological events

Question 23

what are the four eras

Answer 23

Pre Cambrian , Paleozoic, Mesozoic, Cenozoic

Question 24

Pre Cambrian era

Answer 24

Mostly life forms similar to bacteria

Question 25

Paleozoic era

Answer 25

mostly marine invertebrates

Question 26

Mesozoic era

Answer 26

age of the dinosaurs

Question 27

Cenozoic

Answer 27

age of the mammals

Question 28

What are the names of the Paleozoic periods from oldest tp youngest

Answer 28

Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, Permian

Question 29

What are the mesozoic periods in order from oldest to youngest

Answer 29

Triassic, jurassic, cretaceous

Question 30

What are the names of the Cenozoic periods fro oldest to youngest

Answer 30

Tertiary, Quartenary

Question 31

the age of the fish is………

Answer 31

Devonian period

Question 32

What is the age of the reptiles?

Answer 32

Triassic period

Question 33

Whats the age of the dinosaurs

Answer 33

Jurassic period

Question 34

What is the age of the mammals

Answer 34

Tertiary

Question 35

What caused the mass extinction of the mesozoic era

Answer 35

An object from space

Question 36

Fossils-

Answer 36

preserved remains

Question 37

Lack of deposition=

Answer 37

Was brought out of the water

Question 38

What is the cambrian explosion

Answer 38

an outburst of evolved lifeforms

Question 39

What caused the Cambrian explosion

Answer 39

Evolution