1st answer will be brainliest surface currents are caused by a- differences in water temperature b- high salinity c- differences in density d- wind forces

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.

In an experiment, how can i change human errors? be specific.

Need only answer if you think you know it