Fill in the blanks with the word that best completes each statement Scientists develop knowledge by making
about the natural world that may lead to a scientific
question
A scientific question may lead to ain)
which can be tested,
The results of
can lead to changes in scientific knowledge,
Intro

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray