How are changes in climate predicted to affect natural ecosytems, including forests and insects?
What will be an ideal response?
C3 plants, which cannot photosynthesize at low CO2 concentrations, are more sensitive to changes in CO2 concentrations. Therefore, increasing CO2 concentrations could lead to preferential growth of C3 plants (which include most trees). C4 plants, including tropical grasses, corn, and sugarcane, will not be greatly affected by higher CO2 levels. As the climate warms, some insects that are currently confined to warm, tropical climates (e.g., the Anopheles mosquito which carries malaria), may expand their ranges poleward. The potato leafhopper is a crop pest that may expand northward into the United States Midwest.
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Which of the following describes why the net force acting on air that is blowing parallel to straight contours at constant speed is zero?
A. Coriolis and pressure gradient forces are equal and pulling in opposite directions. B. Coriolis and pressure gradient forces are equal and pulling in identical directions. C. Coriolis and frictional forces are equal, and pulling in identical directions. D. Coriolis and frictional forces are equal, and pulling in opposite directions.
Uranium mining and milling can result in waste that contains gamma radiation.
Answer the following statement true (T) or false (F)
An Alka-Seltzer antacid tablet bubbles vigorously when placed in water but only slowly when placed in an alcoholic beverage of the same temperature containing a 50:50 mix of alcohol and water
Propose a probable explanation involving the relationship between the speed of a reaction and molecular collisions. A) The alcohol absorbs the carbon dioxide bubbles before they escape the liquid phase. B) Alcohol molecules are more massive than water molecules, hence they move slower and their collisions are not as forceful. C) The tablet reacts with water but not the alcohol. D) In a 50 : 50 mix there are fewer water molecules for the antacid molecules to collide with.
The Appalachian Mountains are older than the Rocky Mountains
Indicate whether the statement is true or false