Unit 6 lesson 3

Question 1

Earth forms. First single called organisms evolve

Answer 1

Pre cambrian

Question 2

An evolutionary burst in which new life forms evolve. Mostly invertebrates

Answer 2

Cambrian

Question 3

First vertebrates appeared. Insects and plant life evolved

Answer 3

Ordovician

Question 4

Plants grow abundantly. Evolved that they could flourish in drier areas. Early fish become more common in the seas

Answer 4

Silurian

Question 5

Age of the fish. Vertebrates become more abundant. All types of fish even sharks evolve. Vertebrates first reach land.

Answer 5

Devonian

Question 6

Reptiles and giant insects evolve. Ferns and cone bearing plants create forests.

Answer 6

Carboniferous

Question 7

Mass extinction occurs. Pangea forms

Answer 7

Permian

Question 8

Age of reptiles. Reptile flourish and first dinosaurs evolve. First mammals evolve.

Answer 8

Triassic

Question 9

Dinosaurs become common. First birds evolve. Also had many sea and ocean creatures. Flying reptiles evolve

Answer 9

Jurassic

Question 10

Diaspora are widespread. Birds begin to replace flying reptiles. Lowering plants appear. Another mass extinction occurs

Answer 10

Cretaceous

Question 11

Mammals thrive. Grasses spread widely

Answer 11

Paleogene

Question 12

Some mammals and birds evolve to become vey large

Answer 12

Neogene

Question 14

Ice ages occur. Age of humans. First humans evolve

Answer 14

Quarternary

Question 15

Contains the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian period

Answer 15

Paleozoic era

Question 16

Contains the Triassic, Jurassic, and Cretaceous periods

Answer 16

Mesozoic era

Question 17

Contains the paleogene, neogene, and quarternary periods

Answer 17

Cenozoic era

Question 18

When earth formed

Answer 18

Precambrian time