*Question*
Q: Most of the heat that enters the mesosphere comes from where? Choices: - Earth's surface - Exosphere - Troposphere - the stratosphere A:
**Answer**
the stratosphere

*Question*
Q: What is the name of the formation that regulates sleep and arousal? Choices: - gelechioidea formation - epithelial formation - sleep-arousal formation - reticular formation A:
**Answer**
reticular formation

*Question*
Q: What weather phenomenon increases the rate of weathering in rock and soil? Choices: - temperature - earthquake - landslide - rainfall A:
**Answer**
rainfall

*Question*
Q: Spirals, spheres, and rods are examples of what distinguishing property of bacteria? Choices: - function - color - organ - shape A:
**Answer**
shape