1A. Experimental Variables Assessment

Any condition that may cause a change in the system being studied

The condition in a system that the scientist can control

Any condition in a system being studied that is intentionally held constant by the scientist

Any condition that may cause a change in the system being studied and can be recorded quantitatively

controlled experiments allow scientists to test how several variables might cause an effect at the same time

controlled experiments are easier and less expensive to setup

controlled experiments allow scientists to ensure that any effects that are measured are a result of the one variable that is being changed

scientists generally don't run controlled experiments

Rats fed a standard rat diet (not organic)

Rats fed an all-organic diet

Rats fed an all-organic diet, but half the amount of normal

Rats that are not fed anything

Rats fed a standard rat diet (not organic)

Rats fed an all-organic diet

Rats fed an all-organic diet, but half the amount of normal

Rats that are not fed anything

control groups serve as a way to practice setting up the experimental group and caring for animals

control groups allow the scientist to tell if the specimens were contaminated from the experimental group

control groups allow the scientist to compare the effects on the experimental group to a similar group that was not exposed to the independent variable

In most experiments a control group isn't necessary because they just need to collect data on the experimental group

Temperature is dependent and rate of chirping is independent

Rate of chirping is dependent and temperature is independent

Both temperature and rate of chirping are independent

Both temperature and rate of chirping are dependent

None of the above