1) what two layers of the atmosphere protect us?

2)what does the air in the troposphere do as it heats up from the sun?

3)what is the temperature change in the troposphere with the temperature change in the stratosphere?

4)where is the ozone layer and why is it important?

5)why do pilots usually fly in the atmosphere?

6)what attaches it self to this jet stream and, in a sense, tells you where the stratosphere begins?

80 pts the type of cloud shown here may produce heavy rainfall. this type of cloud most likely occurs in an area of the sub-saharan that is a) often dry. b) often wet. c) very windy. d) usually cool.

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade