Advertisement Upgrade to remove ads

elevation

the height of the land in relation to sea level

relief

differences in elevation

groundwater

water beneath Earth's surface

source

the place where a river begins

channel

the deepest part of a river or other body of water

mouth

the place where a river empties into a larger body of water

tributary

a stream or river that flows into a larger stream or river

river system

a river and its tributaries

drainage basin

the land drained by a river system

erosion

the gradual wearing away of Earth's surface

flood plain

the low, flat land along a river

delta

the triangle shaped land at a river's mouth

three main parts of a river

(1) source, (2) path or channel, (3) mouth

levees and dams

these are built to control flooding on rivers

precipitation

any form of water such as rain, sleet or snow that falls to Earth's surface

climate

the kind of weather a place has over a long time

humidity

the amount of moisture in the air

tornado

a funnel-shaped, spinning wind storm; sometimes called a cyclone or twister

hurricane

a huge tropical storm with heavy rains and winds of at least 74 miles per hour

drought

a long period of little or no rain

weather

day-to-day conditions of a place

places near the equator

these places have warmer climates

places far from the equator

these places have cooler climates

large bodies of water

they help keep nearby places cooler in summer and warmer in winter

climate is affected by __________

elevation; higher elevations are usually cooler

natural resource

something found in nature that people can use; soil, water and trees

product

something that people make or grow

scarce

not abundant

mineral

a natural substance found in rocks

fuel

a natural resource, such as coal, oil or natural gas, burned to make heat or energy

conservation

the protecting of natural resources and using them wisely

renewable

able to be made or grown again by nature or people

recycle

to use again; by recycling paper products, we help to conserve trees

non-renewable

not able to be made again quickly by nature or people

pollution

the act of making a natural resource dirty or unsafe to use, such as air, soil or water

water

our most important natural resource; we cannot survive without it

fertile soil

an important natural resource for American farmers

most abundant fuel source in the U.S.

coal

rivers in the Great Basin

they drain into low-lying land rather than into an ocean

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set