Question 4
About how much of the Earth's surface is covered by water?
The right answer is the one marked above.
About 70%. That water is the hydrosphere.
Lesson: Chapter 15 — The biosphere
15.1. Ecological balance and levels of organisation
4 of 4
Clear all your answers?
This erases every answer in this set and starts you again at question one. Your score will be gone.
Type these four numbers to confirm:
Those numbers don't match. Look at them again and type them.
This browser is not saving your answers, so no total can be shown.
Answer the question to continue.