Which are characteristics of electromagnetic waves? check all that apply. travel in straight lines and can bounce off surfaces travel through space at the speed of light travel only through matter travel only through space can bend around objects move by particles bumping into each other move by the interaction between an electric field and a magnetic field

Correct choices are marked in bold:

travel in straight lines and can bounce off surfaces  --> TRUE, normally electromagnetic waves travel in straight lines, however they can be reflected by objects, bouncing off their surfaces

travel through space at the speed of light  --> TRUE, all electromagnetic waves in space (vacuum) travel at the speed of light, )

travel only through matter  --> FALSE; electromagnetic waves can also travel through vacuum

travel only through space  --> FALSE, electromagnetic waves can also travel through matter

can bend around objects  --> TRUE, this is what happens for instance when diffraction occurs: electromagnetic waves are bended around obstacles or small slits

move by particles bumping into each other  --> FALSE, electromagnetic waves are oscillations of electric and magnetic fields, so no particles are involved

move by the interaction between an electric field and a magnetic field --> TRUE, electromagnetic waves consist of an electric field and a magnetic field oscillating in a direction perpendicular to the direction of motion of the wave

Electromagnetic waves are those waves that do not require a material medium for propagation.

Electromagnetic waves are those waves that do not require a material medium for propagation. Examples of electromagnetic waves include, visible light, x- rays, gamma rays etc.

The following are characteristics of electromagnetic waves;

Hence, electromagnetic waves are those waves that do not require a material medium for propagation.

Learn more about electromagnetic wave: link

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

there are no contact forces mentioned on the list of choices that you've provided.