Which are characteristics of electromagnetic waves? Check all that apply. 1. travel in straight lines and can bounce off surfaces
2. travel through space at the speed of light
3. travel only through matter
4. travel only through space
5. can bend around objects
6. move by particles bumping into each other
5. move by the interaction between an electric field and a magnetic field

There are no answer choices, but a metaphor is a comparison between two objects that are not usually related without using like or as.

Stars are born within the clouds of dust and scattered throughout most galaxies. a familiar example of such as a dust cloud is the orion nebula. turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. as the cloud collapses, the material at the center begins to heat up. known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star. three-dimensional computer models of star formation predict that the spinning clouds of collapsing gas and dust may break up into two or three blobs; this would explain why the majority the stars in the milky way are paired or in groups of multiple stars.therefor, i would say the answer is: dust and gases contract.i hope this ! < 3

If element x has 21 protons, element x has 21 electrons