evolution

The origin of earth occurs at?

• 3.5 billion years ago

• 4.5 billion years ago

• 5.4 billion years ago

• 5.3 billion years ago

The origin of life on earth occurs at?

• 3.5 billion years ago

• 4.5 billion years ago

• 5.4 billion years ago

• 5.3 billion years ago

What is modern theory of origin of earth?

• nebular theory

• spontaneous genaration theory

• cosmozoic theory

• big bang theory

In earlier Earth crust was created by?

• metal

• carbon rock

• light silicon rock

• water

What is the absence gas of early atmosphere?

• O2

• CO2

• H2S

• CH4