A system that consists of tributaries, watersheds and divides is called
Temperature, salinity and density are factors that form
Please select the word from the list that best fits the definition _________ occurs when the Earth, Sun and Moon form a straight line.
The oceans were formed when the earth cooled and water vapor condensed to create rain.
The 3 stages of the water cycle are
Which of the following statements about the effects of pollution on marine ecosystems is true?
Groundwater overdraft occurs when _______.
Aquifers are _______.
Which of the following is NOT an effect of El Niño?
The defining characteristic of potable water is that it _______.
Which of the following is least likely to have difficulties with economic access to potable water?
Which of the following is not an effect of erosion on lakes?
Australian aborigines could not use wells in the desert due to lack of groundwater.
The use of buffer strips can help reduce human impacts on waterways.
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