Which of the following about the copperhead snake is true?
a.
the copperhead snake is one of six venomous species in north america.
b.
copperhead snakes average 4.5 feet in length.
c.
copperhead snakes are not camouflaged.
d.
copperhead snakes detect heat given off by potential prey.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.