Which of the following statements best describes the biosphere?
a. its a mixture of gases that contain dust particles.
b. it contains earths metal core.
c. it contains all of earths water.
d. it is a part of the earth that contains living organisms.

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases