Early earth test

Question 1

Fossils and paleontology

Answer 1

Fossils= remains of plants/animals that lived in different geologic time
Paleontology= Study of fossils

Question 2

Fossil rock

Answer 2

Fossils are found in sedimentary rock

Question 3

Relative age vs. absolute age

Answer 3

Relative age= indicates one layer is younger or older than another layer of rock.
absolute age= numeric age of rock.
Both are important because you need to know actual vs. comparative

Question 4

Radiometric dating and half-life

Answer 4

Radiometric dating= determining fo age by measuring radioactivity in the item.
Half-life= The time required for half of the sample of the radioactive isotope to break down and form the daughter isotope.

Question 5

Geologic column, geologic time scale, and Mass extinction.

Answer 5

Geo. column= Record of all geologic time by combining things to make a time mash up.
geo. time scale= ordered arrangement of rock layers that represents a timeline of earth’s history
Mass extinction= Species dies down completely

Question 6

Supercontinent cycle and pangea

Answer 6

Happened multiple times
Continents have come together to form super continents over millions of years.
Pangea= supercontinent formed 3 million yrs. ago

Question 7

Early earth and precambrian time

Answer 7

Early earth= large cloud spinning around the sun
Precambrian time= 4.6 billion yrs. ago to 542 million years ago
We know very little about this time, because it was very difficult to interpret the rocks

Question 8

Paleozoic era

Answer 8

age of fish
542 million yrs. ago -251 million years ago
Ended by earths land masses being scattered throughout the world
Lots of fossils!

Question 9

Mesozoic era

Answer 9

age of reptiles 
251-66 million years ago
Pangea broke into smaller continents
warm and humid conditions
Asteroid impact wiped out dinosaurs. . . era ended.

Question 10

cenozoic era

Answer 10

age of mammals
65 million years ago- present
Ice ages

Question 11

Apes, us, and primates

Answer 11

We likely have a common ancestor with apes

Apes and humans are primates and were non-existent until after dinosaurs.

Question 12

Hominids

Answer 12

Hominids= family of humans and other human-like ancestors
Bipedalism
18 different types discovered

Question 13

Australopithecines and hominids p.2

Answer 13

Hominids appeared more similar to modern humans 2.4 million years ago by having larger brains, rounder skulls, advanced tools, and walked upright.
Homo erectus
different form apes: slightly larger brains, climbed trees, walked on 2 legs, and used stone tools

Question 14

Neanderthals and hominids

Answer 14

As tall as modern humans
2 types of hominids may have lived at the same time
Hunted large animals and wore clothing

Question 15

Humans today

Answer 15

First appeared 100,000 - 160,000 yrs ago
Homo sapien sapiens
Left Africa 40,00 to 100,00 years ago

Question 16

Early Homosapiens

Answer 16

Smaller faces, flatter faces, rounder skulls, art, clothing society