Grasses and fast-growing trees like poplars are planted on _____________ plantations to provide fuel for power plants.
Fill in the blank(s) with the appropriate word(s).
biomass
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The ________ is calculated by subtracting the day's low temperature from the day's high temperature
What will be an ideal response?
Which of the following is true of effective collisions?
A) The number of effective collisions determines the reaction rate. B) The number of effective collisions increases as the temperature is increased. C) both a and b D) neither a nor b
The greatest warming experienced over the globe in the last 100 years has occurred in ____
a. Greenland and the mid-latitude continents in summer and fall b. the United States in winter and spring c. parts of Antarctica during the entire year d. the arctic and over the mid-latitude continents in winter and spring e. the oceans of the Southern Hemisphere and parts of Antarctica in spring and summer
________ is another name for pyroclastic materials
A) Fumarole B) Volatiles C) Tephra D) Caldera