The yeast in bread dough feeds on sugar to produce carbon dioxide. Why does the dough rise faster in a warmer area?
A) There is a greater number of effective collisions among reacting molecules.
B) Atmospheric pressure decreases with increasing temperature.
C) The yeast tends to "wake up" with warmer temperatures, which is why baker's yeast is best stored in the refrigerator.
D) The rate of evaporation increases with increasing temperature.
A
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Refraction causes a fish in water to appear
A. nearer the surface. B. deeper. C. neither deeper nor closer. D. none of the above
Which of the following statements describes the mid-Holocene climatic optimum?
A. Continental ice sheets began to melt. B. Alpine glaciers began to advance down river valleys. C. Average temperatures were colder than at present. D. The climate favoured the development of certain plants.
The dot on this map represents Missouri. Based on your knowledge of the anticyclone's wind direction, how would temperatures change between 2/11/2012 and 2/13/2012?
A) Cooler then warmer
B) Warmer then cooler
C) Cold then colder
D) Temperatures wouldn't change
How long does it take most deep water to rise to the surface?
a. 100 to 200 years b. 200 to 300 years c. 500 to 600 years d. 1,500 to 1,600 years