Which term describes a bright streak of light that results when a meteoroid burns up in Earth's atmosphere?
a
asteroid
b
comet
С
meteor
d
meteorite

What happens to light waves from a star as the star moves away from earth?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve