Answer:
In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.
Answer:
pumpkin
Explanation:
watermelon and pumpkins are close to shape and size
Answer:
northen henisphere,southern hemisphere, Eastern hemisphere, Western hemisphere.
