Industrialization, the burning of tropical forests and other factors although often bad for the environment, have produced a steady decline in carbon dioxide emissions
Indicate whether the statement is true or false
F
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Arsenic is released into drinking water
a. from inorganic fertilizers b. from sewage and animal wastes c. from food processing facilities d. when any well is drilled down to the water table e. from mining refuse
A catalyst speeds up a chemical reaction as a result of which of the following?
A) It provides an alternate pathway with a lower activation energy. B) It increases the number of collisions between reacting molecules. C) It makes the reaction more endothermic. D) It makes the reaction more exothermic.
Which of the following features are generally NOT associated with mountain streams and rivers?
A. meanders B. canyons incised into bedrock C. waterfalls D. rapids
With respect to minerals, which of the following is true?
A) All minerals have been discovered. B) More than 500,000 minerals exist. C) Mineral is a synonym for rock. D) All minerals crystals are too small to be seen. E) Fewer than 20 minerals make up 95% of the crust.