Lesson 6

Question 1

An era that is composed of the Hadean, Archean and Proterozoic eras

Answer 1

Precambrian Era

Question 2

Covers approximately 88% of the Earth’s history

Answer 2

Precambrian

Question 3

Where hard body parts (fossils) were discovered

Answer 3

South Australia

Question 4

This is when the Earth was formed
(Hint: eon)

Answer 4

Hadean eon

Question 5

Large planetoid that is the size of Mars

Answer 5

Planet Theia

Question 6

This is when the Earth was able to support oceans and continents and this is when the ozone layer formed

Answer 6

Archaean eon

Question 7

The oxygen crisis for anaerobic cyanobacteria

Answer 7

Proterozoic eon

Question 8

The emergence of eukaryotes and multicellular organisms

Answer 8

Proterozoic eon

Question 9

This is when plant life has existed

Answer 9

Phanerozoic eon

Question 10

The age of invertebrates, fish and amphibians

Answer 10

Paleozoic era

Question 11

The age of reptiles and dinosaurs

Answer 11

Mesozoic era

Question 12

This is when the supercontinent pangaea started to separate

Answer 12

Mesozoic era

Question 13

Dinosaur extinction and human evolution

Answer 13

Cenozoic era

Question 14

This is the era when mammals are diversified

Answer 14

Cenozoic era

Question 15

The stone age

Answer 15

Cenozoic era