Which of the following statements about weight and mass is true?
a. Mass is the same as weight
b. The weight of an object on the Moon is more than its weight on Earth
c. The mass of an object on the Moon is the same as its mass on Earth
d. The mass on an object on the Moon is less than its mass on Earth
Answer: c. The mass of an object on the Moon is the same as its mass on Earth
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Of the total energy intercepted at Earth's surface and available for work, only about ________ is actually fixed by photosynthesis
A) 1% B) 5% C) 10% D) 15%
Which of the following is the method of combing foods to provide an adequate supply of all the essential amino acids?
A) protein augmentation B) protein complementation C) protein matching D) protein supplementation
General Circulation Models (GCM)
A) use data collected exclusively from high-resolution satellites. B) use spectral models derived from energy released from the earth and clouds. C) can be run on powerful home computers, allowing citizen scientists to run models. D) use complicated two-dimensional grid systems that change temporally.
Grazers are well suited to savannas because
A) none of their natural predators live there. B) they are able to migrate seasonally toward the wetter areas. C) they can pull up grasses there by the roots. D) the grasses there are ephemeral.