Life on Earth quiz

How old is Life on Earth?

A 568,892,653 years exactly
B 350 million years
C 5,000 billion years
D 3,500 million years
E 4,008 years

What changed the air?

A Cyanobacteria
B The Great Penguin
C Dinosaurs
D People

What 'waste gas' do cyanobacteria and plants make (by photosynthesis)?

A Carbon dioxide
B Sugar
C Oxygen