See what we can offer to your school
"SimpleStudy just makes sense...”
Get the best plan for your school
10 questions from this quiz
4.6 billion years ago
Pressure decreases, gases are released
Water vapour
No red sedimentary rocks before 2 billion years ago
350 million years ago
78% nitrogen, 21% oxygen
97%
Evaporation
100 million years
Lakes are temporary with outflowing rivers
Select your subjects, and get access to A+ resources today.