Create an account
A biome that has cold long winters and a short growing season. Conifers grow well in this area.
a plant species that grows very small seeds tha can be ground to use as a spice. The plant itself can be eaten as greens as well.
A world wide cultivated grass that is harvested and the seed is ground into flour to make bread. Second largest crop in the world.
any of the fungi or bacteria that break down dead plant and animals into useful things like minerals and rich soil.
members of a kingdom that contain one celled and many-celled living things that absorb food through their environment. A decomposer- mushrooms are an example.
is the graphical representation of the levels (nutritional) by which the incoming solar energy is transferred into an ecosystem.
active demand by two or more organisms or kinds of organisms for some environmental resource in short supply
is a behavior that was observed by an individual that they find it to be beneficial to them in some way.
added to the environment can create algae blooms which can choke out existing organisms in an aquatic ecosystem.
tropical rain forest
a hot, humid biome near the equator, with much rainfall and a wide variety of life.
a species threatened with extinction; broadly: anyone or anything whose continued existence is threatened.
having an uncertain chance of continued survival <a threatened species> specifically: likely to become an endangered species
a biome where grasses, not trees, are the main plant life. Prairies are one kind of grassland region.
Used to determine the measure of its ph which tells the level of acidic, neutral or basic of a substance.
a largely inheritable and unalterable tendency of an organism to make a complex and specific response to environmental stimuli without involving reason
A visible collection of tiny water droplets or, at colder temperatures, ice crystals floating in the air above the surface.
Thin wispy clouds that form high in the atmosphere as their water vapor freezes into ice crystals. They do not produce precipitation.
The amount of water vapor present in a unit of volume of air. A hydroscope indicates the amount of humidity in the air
A scientist who studies and predicts the weather. Meteorologists use sophisticated equipment, like Doppler radar and supercomputers, but they also rely on old-fashioned sky watching.
General name for water in any form falling from clouds. This includes rain, drizzle, hail, snow and sleet. Although, dew, frost and fog are not considered to be precipitation.
The movement of air relative to the surface of the earth. It's considered to be severe if 58 m.p.h. or greater. Hurricane winds are 74 m.p.h or greater and the highest tornado winds are about 318 m.p.h.
The measurement of how hot or cold something is. Thermometer - the instrument that measures temperature.
It describes the condition of the air at a particular time and place. Weather also tells how the air moves (wind) and describes anything it might be carrying such as rain, snow or clouds. Thunder, lightning, rainbows, haze and other special events are all part of weather.
They are intense storms with swirling winds up to 150 miles per hour. Usually around 300 miles across, hurricanes are 1,000-5,000 times larger than tornadoes. Hurricanes are known by different names around the world. In Japan they are Typhoons, while Australians call them Willy-Willys.
The average of all weather conditions through all season over a period of time. It describes the average weather conditions in a certain place or during a certain season. Weather may change from day to day, but climate changes only over hundreds or thousands of years. Many animals and plants need one kind of climate to survive. Dolphins and palm trees can live only in a warm climate, while polar bears and spruce trees need a cold climate.
Water that forms on objects close to the ground when its temperature falls below the dew point of the surface air.
It begins as a funnel cloud with spinning columns of air that drop down from a severe thunderstorm. When they reach the ground they become tornadoes. Tornadoes are between 300 and 2,000 feet wide and travel at speeds of 20 to 45 miles per hour. They usually only last a few minutes, but their spinning winds, up to 300 miles per hour, can lift houses into the air and rip trees from the ground.
wears away earth materials by water, wind, or ice. Plants and trees along the river bank help protect the bank from erosion.
used to describe the measurement of the steepness, incline, gradient, or grade of a straight line. A higher slope value indicates a steeper incline.
causes water to flow from higher places to lower places on the earth and in the stream table models.
Sand grains knocking the paint off of beach houses, and a farmers rich topsoil being blow away are two good examples of what this kind of erosion can do.
A fan shaped deposit of earth materials at the mouth of a stream. They are created by deposition. When a fast moving narrow river flows into a large body of water like a lake or ocean you would expect the water to slow and a delta to form.
A curve or loop in a river or stream. This is a stream where erosion on one bank and deposits on the other bank make big curves in the riverbed.
are designed to hold back water so that the river will not flood its banks. They provide places for people to boat swim and fish in the lake behind that dam that is created. In some cases a dam can provide electricity for a town.
contour interval map
The vertical distance between contour lines is the contour interval. These contours indicate the elevation of each level.
The substrate of the stream channel between the ordinary high water marks. The substrate may be bedrock or inorganic particles that range in size
a fan-shaped deposit of earth materials formed where a stream flows from a steep slop onto flatter land.
an embankment along a stream that protects land from flooding. Levees can be natural or constructed.
A force of attraction between any two masses. The strength of this force is dependent on the mass of each object and their distance from one another.
The tendency of a moving object to stay in motion or a resting object to stay still is inertia.
A push or a pull. A force is also needed to make a moving object slow down, change direction or stop moving.
A measure of how fast something is moving. How far an object can go in a certain amount of time.
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 and try again
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