Formaldehyde is a toxic preservative with the following chemical formula: H2C O Which of the following compounds would best serve as a starting point for its production?
A) H3COH
B) H2C CH2
C) H2O
D) CH3CH2OH
E) none of the above
A
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Coral reefs are made of ____
a. volcanic rock b. gravel-sized marine sediments c. seaweed d. limestone skeletons of tiny marine animals
You are making a map of population density per state. You are wanting to color-code each state a different shade of blue, with dark blue indicating high density and light blue low density. Which type of map would you generate to display the data?
A) regional B) graphic C) aerial D) thematic E) choropleth
The polar high is more pronounced over ________ because of the ________ there
A) the Antarctic; colder ocean waters B) the Antarctic; greater landmass C) the Arctic; colder ocean waters D) the Arctic; greater landmass
There is no one maximum depth for desert blowouts. They vary in depth depending on conditions present at the location. What controls the depth of all blowouts?
A) Force of the moving wind B) Velocity of water eddy C) Elevation of water table D) Amount of water available for dissolution of underlying materials