Which method would be best to separate a mixture of sand and gravel?

magnetism
filtration
screening
separation by density

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

Compare and contrast refraction of light and sound will give brainliest

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box