Question

Scientist want to set up an experimental
procedure to examine the following.

In an ecosystem, all producers are killed
through a loss of fertility of the soil or
through toxic contamination.

Why would this issue be difficult
to quantitate?

In the scientific method, the validity of
scientific claims is settled by referring
to observations of phenomena.

Scientific researchers repeat steps in
an orderly fashion to collect data.

Based upon data, it may be
necessary to test the hypotheses.

Why is it important not to
assume outcome?