Which is a contribution of Calvin Goddard to forensic science? He invented the comparison microscope.
He developed a test for arsenic in tissues.
He invented a system of fingerprint identification.
He used a chemical principle to determine if a crown was made of pure gold.

Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward

In each transformation of energy , some energy what?

Which are evidence of seafloor spreading? check all that apply. molten material magnetic stripes continent material drilled core samples ocean water samples