Some students were building a model of a digestive system. Which choice best describes a process they should show with their model?
a
b
Tissues digest food for the organ system to absorb.
Cells digest food, which is then absorbed by organs.
Organs digest food by working together as a system.
The organ system uses specialized cells to digest food.
d

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