A treeless plain that covers Arctic lands in the region where only grasses and mosses can grow.
The tundra
100
A river that flows into a larger river
Tributary
100
These are resources that can be replaced
Renewable resources
100
This is the climate that we live in
Temperate climate
100
This is the area in the United States that was nicknamed for their funnel shaped storms
Tornado Alley
200
A group of cities that have grown so close together they seem to form one city.
A megalopolis
200
This is the second largest river in the U.S.
The Mississippi River
200
There are resources that cannot be replaced
Nonrenewable resources
200
This climate has a wet and a dry season
Tropical wet climate
200
A funnel shaped wind system that develop over large bodies of water
Hurricane
300
Flat, rolling lands covered with grass.
A prairie
300
The Great Lakes flow right into this river
The St. Lawrence River
300
This is the process of bringing water to dry land through ditches or pipes
Irrigation
300
The western half of North America is dry. It gets less than 20 inches of precipitation a year. What type of climate is this?
Arid
300
Severe winter storms that combine snow and high wind
Blizzards
400
Deep valleys with steep sides
Canyons
400
Where does the Mississippi River end?
The Gulf of Mexico
400
A natural substance that is found in the Earth
A mineral
400
The Southeast United States receives rainfall throughout the year but is less heavy during the hot and humid summer months. What type of climate does the Southeast have?
Humid Subtropical
400
Pollution from burning fossil fuels has created a serious problem. This has also caused an overall rise in the Earth's temperature
Global warming
500
This is the imaginary line in the Rockies
Continental Divide
500
The Mississippi River begins where?
Lake Itasca in Minnesota
500
The Rocky Mountains contain what types of minerals?
Gold, silver, and copper
500
How is climate determined?
By latitude, but also by landforms
500
Scientists developed a theory that the Earth's structure is made up of what?