The earth is formed of layers.
Can I change this sentence into active?
Layers form the earth.
The Oxford advanced learner Dictionary says the word form is:
" [T, often passive] to produce sth in a particular way or make it have a particular shape]"
So I can't decide whether it is suitable to transform the phrase "formed of" into active verb.
Best Answer
Short answer: Yes.
Long answer: But I suggest you add what sort of layers.
For example:
Active voice is often used to emphasize the subject.
Using a vague subject such as "layers" sort of defeats the purpose of using active voice.
Thus, my suggestion to expand the subject.
Good luck!