Chapter 6
The water cycle is the ________
Unending circulation of Earth’s water supply
Plants release water into the atmosphere through a process called ________
Balance in the water cycle means that ________
The average annual precipitation over Earth equals the amount of water that evaporates
The ability of a stream to erode and transport material depends largely on its _______.
The single most important erosional agent on Earth is ________.
Running water
If you were to examine the profile of a typical stream, you would probably find that the gradient is ________.
Steepest near the head
A stream’s discharge _______.
Increases between its source and mouth
Base level is _______.
The lowest point to which a stream an erode its channel
What is the ultimate base level of a stream?
The ocean
Most streams carry the largest part of their load _______.
In suspension
The suspended load of a stream _______.
Usually consists of fine sand, silt, and clay-sized particles
A depositional feature that forms where a stream enters an ocean is a(n) _______.
In a stream channel, which of the following will be deposited first?
Gravel-sized particles
The flat portion of a valley floor adjacent to a stream channel is called a _______.
The most prominent features of a narrow, V-shaped valley, where the stream profile drops rapidly, are _______.
Rapids and waterfalls
One traditional flood control method has been to attempt to keep the stream’s flow within its channel by creating ______.
Artificial levees
A drainage basin is ________.
The land area that contributes
Groundwater is found underground in the zone of ______.
Permeable rock layers or sediments that transmit groundwater freely are called ________.
The percentage of the total volume of rock or sediment that consists of pore spaces is called ________.
Which of the following is a measure of a material’s ability to transmit fluids through interconnected pore spaces?
Springs form where ________.
The water table intersects
When groundwater enters underground fractures or caverns in hot igneous rocks, where it is heated to building temperatures, what feature can form?
Which of the following statements is true about stalactites?
Which of the following is associated with areas of karst topography?
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