The Earth's largest ocean is the
A) Atlantic.
B) Pacific.
C) Arctic.
D) World Oceanthere is one big ocean taking up three-quarters of the world
Question 2
The origin of Earth's primitive ozone layer
A) is attributed to photosynthesis.
B) traces back to the Cambrian period.
C) is attributed to volcanic eruptions.
D) helped to form the oceans.