Which of the following statements best describes a difference between mechanical waves and electromagnetic
waves?

a. Mechanical waves can travel in any direction, while electromagnetic waves travel only in one direction.

b. Mechanical waves travel only at the speed of light, while electromagnetic waves can travel at many different speeds.

c. Mechanical waves can produce colored light, while electromagnetic waves cannot.

d. Mechanical waves travel only through a medium, while electromagnetic waves can also travel through a vacuum.

Which of the rock examples below is most likely to be metamorphic

Apart of an ecosystem that can restrict the growth of a population is referred to as

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.