Explain how increasing atmospheric carbon dioxide levels affect coral reef ecosystems
What will be an ideal response?
Increasing atmospheric carbon dioxide levels affect coral reefs in two ways. First, increasing carbon dioxide in the atmosphere causes increased global air temperatures, resulting in the warming of oceans. The increase in ocean temperatures in coral reef ecosystems causes the loss of algae associated with coral reefs, resulting in coral bleaching. Without the algae, coral reefs do not grow as quickly and face a higher likelihood of death. Second, increased levels of atmospheric carbon dioxide will cause an increase in the amount of carbon dioxide dissolving in ocean water to form carbonic acid, thus increasing the concentrations of hydrogen ions in the oceans and lowering the ocean's pH. This acidification of ocean water decreases the availability of carbonate ions that corals need to build their exoskeletons. The exoskeletons of corals can actually dissolve if the water becomes too acidic.
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If you were in southern Ontario and you wanted to stand with the average prevailing winds blowing in your face, in which direction would you face?
A. north B. south C. east D. west
Determine if the phrase in bold applies to only contact metamorphism, only regional metamorphism, both types of metamorphism or neither type of metamorphism. Form as a result of melting
A. Both contact and regional metamorphism B. Only contact metamorphism C. Only regional metamorphism D. Neither contact or regional metamorphism
A pair of ________ typically protects the channel of a river entering the sea
Fill in the blank(s) with correct word
Chloroform has a normal boiling point of 61.7°C. Which of the following is true?
A) At any temperature the vapor pressure of chloroform is greater than that of water. B) Chloroform is less volatile than water. C) Both a and b are correct. D) Neither a nor b is correct.