1. Y-axis is type of sound being measured X-axis is the decibels/sound level for type of sound being measured
2. Whisper - 20 decibels, normal taking - 60 decibels, rock concert - 120 decibels
3. every ten decibels is ten times as loud. If a whisper is 20 decibels and normal talking is 60 decibels then normal talking is 40 times as intense as whispering
4. Rock concert, pain threshold and jet plane could be painful if exposed to them
a control helps to increase the reliability of the results. it allows a scientist to compare it to other group(s) in an experiment. if a scientist notices a significant different btwn the control and the other groups, he can logically conclude that the independent variable has an impact on the dependent variable.
a variable is any factor, trait or condition that can exist in differing amounts or types. there are usually three tpes of variables in experiments: the independent, dependent and contolled. the independent variable variable is the one that is changed by the scientists to figure it's affect on something.
<span>A higher developed organism will have a higher degree of specialization.</span>
