How many states of matter are there?
a. 3
b. 1
c. 4
d. 2
Ans: a. 3
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Which of the following statements about ocean productivity is true?
A) Productivity decreases in upwelling zones because the colder temperatures of the waters slow the process of photosynthesis. B) Sunlight and the availability of nutrients are two factors that regulate ocean productivity. C) Ocean productivity is highest in the aphotic zone. D) Limestone (calcium carbonate) is the source of carbon that enters the marine food web.
Maritime tropical masses reach North America from all of the following areas except
A) the northern Pacific. B) the eastern Pacific. C) the Gulf of Mexico. D) the Middle Atlantic.
Density is a measure of relative heaviness and is defined as mass per unit volume
Indicate whether the statement is true or false
The 2004 Indian Ocean tsunami was caused by Earth's third-most powerful earthquake in the last 100 years.
Answer the following statement true (T) or false (F)