2. Why are numbers better than words in a science experiment?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Explain earth's motion, using the terms "precession" and "rotation" in your answer.