Which of the following statements best describes why holes develop in snow around tree trunks?
A. Snow is a poor absorber of visible light.
B. Snow is a poor reflector of visible light.
C. Snow is a good absorber of infrared energy.
D. Snow is a good emitter of infrared energy.
Answer: C
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a. observation b. measurement c. test d. proposed explanation
What prevents stars greater than about 100 times the Sun's mass from existing?
A. The gravitational attraction would overcome the rate of thermal expansion leading to a black hole. B. The gaseous material of the universe is too widely dispersed to allow for the formation of stars of this mass. C. Fusion cannot take place at these higher mass levels. D. The rate of thermal expansion would overcome gravitational attraction leading to explosion.
Companies cannot always offer affordable disaster insurance because ____.?
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What do you think are the biggest challenges related to soil conservation and management in the coming decades?
What will be an ideal response?