A group of students is setting up a test to see whether earthworms, like those shown in the photo, prefer rough or smooth surfaces.

Question

Which type of investigation is the group doing?

A.
Experimental

B.
Comparative

C.

Answer 1

Observational

Answer 2

A group of students is setting up a test to see whether earthworms, like those shown in the photo, prefer rough or smooth surfaces.

Which type of investigation is the group doing?

A.
Experimental

B.
Comparative

C.
Descriptive

D.
Controlled

Answer 3

A. Experimental