Geologic eras

Question 1

How old is our planet?

Answer 1

4.6 billion years old

Question 2

What is the order of the geologic time?
(oldest to youngest)

Answer 2

1. Precambrian ( 88% )
   [4.6 bya - 570 mya ]
2. Paleczoic ( 7% )
   [570 mya - 245 mya ]
3. Mesozoic ( 4% )
   [245 mya - 65 mya ]
4. Cenozoic ( 1% )
   [65 mya - now]

Question 3

What is the precambrain area?

Answer 3

[4.6 bya - 570 mya ]

• longest area ( 88%)
• only singular / multi celluar organisms exist
• sponges & jellyfish
• canadian shield forms

Question 4

What is the Paleczoic era?

Answer 4

[570 mya - 245 mya ] ( %7 )

• Sedimentary rocks form
• age of marine life
• Mountains form
• largest mass extinction wiping out 96% marine life
• sharks & fish

Question 5

What is Mesozoic era?

Answer 5

[245 mya - 65 mya ] (4%)

• era of dinosaurs

-western cordillera begins

• 65 mya dinosaurs got extinct

Question 6

Cenozoic era

Answer 6

[65 mya - now] (1%)

• era of animals
• cats dogs, horses, rabbits, monkeys
• lucy
• end of ice age
• start of human race