Astar with a continuous spectrum shines through a cool interstellar cloud composed primarily of hydrogen. the cloud is falling inward toward the star (and away from earth). which best describes the spectrum seen by an earthbound observer

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Because north america is in a it has a variety of biomes and climates. a. high latitude zone c. middle latitude zone b. middle longitude zone d. high longitude zone select the best answer from the choices provided a b c d

An enormous wave generated by an earthquake beneath the seafloor is known as a