Which of the following statements is true about a reversible reaction?
A) All reversible reactions are exothermic.
B) All reversible reactions have low activation energy.
C) When we mix the reactants together one or more of the reactants will be completely used up.
D) When we mix the reactants together none of the reactants will be completely used up.
D
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Which of the following is NOT one of the chapter's three big ideas?
a. There are always limits to population growth in nature. b. Certain interactions among species affects their use of resources and their population sizes. c. The balance of nature theory only. d. The balance of nature theory and the concept of restoration of ecosystems by humans. e. Changes in environmental conditions cause communities and ecosystems to gradually alter their species composition and population sizes.
Which oceanic region is known for deep-water upwelling and high levels of biological productivity due to turbulence
and weak stratification? a. The tropical ocean b. The Northern Atlantic ocean c. The temperate ocean d. The southern polar ocean e. The northern polar ocean
The principle that “surface weather systems tend to move in the same direction and at approximately the same speed as they have been moving” forms the basis of which type of forecasting method?
a. persistence forecast b. analogue method c. steady-state forecast d. ensemble forecast e. nowcast.
The rock type that forms at new seafloor spreading centers is
A. rhyolitic. B. granitic. C. andesitic. D. basaltic.