What does viscosity mean?
a. It refers to a temperature gradient in a liquid.
b. It is a measure of flexibility of a solid.
c. It refers to how brittle a solid substance is.
d. It has to do with the resistance of a fluid to flow.
e. It is a measure of the volume of pore space in a volcanic rock
D
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Which of the following is an accurate statement about the frictional force?
A. It accelerates winds near the surface. B. It is zero at the equator. C. It varies depending on the nature of the Earth's surface. D. It is roughly the same up to an altitude of 5 km.
The niche of a species is the functional role of that species in the community that it belongs to
Species that have narrow niches (have very specific resource requirements) are said to be ________, while species that have broad niches (able to use a wide array of resources) are known as ________. A) Type 2 species; Type 3 species B) widespread; restricted C) r-selected species; K-selected species D) specialists; generalists E) generalists; specialists
A lightning flash consisting of many strokes usually lasts less than ____ second
a. one b. three c. five d. seven e. nine
Judge the following sentence according to the criteria given below: Schooling may help fish swim greater distances than individuals BECAUSE the school may appear as a single large and dangerous opponent to a potential predator
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.