The winds that blow from west to east, especially across North America
What are westerlies
200
Lack of water for crops cause farmers to bring water to the fields in a process called....
What is irrigation
200
Scientists believe this is leading to less oxygen in the atmosphere
What is deforestation
300
Connects two larger landmasses and has water on two sides
What is an isthmus
300
The innermost section of the Earth
What is the core (inner core)
300
Is the 4th step in the water cycle
What is collection
300
Has the largest effect to the Earth's climate
What is the sun
300
Originates in the outer mantle
What is magma
400
Technique used to limit the loss of topsoil
What is contour plowing
400
Another name for the Earth's crust
What is lithosphere
400
This event causes extreme weather in the North America, while causing droughts in the eastern Pacific. Heavy rains tend to fall in South America as well.
What is an El Nino event
400
Causes condensation
What is air temperatures drop
400
Iron and other minerals make up most of the Earth's...
What is inner core
500
Underground layer of rock through which water flows
What is an aquifer
500
This was the landform scientists believe broke up to form Africa and South America
What is Pangaea
500
Where most hurricanes occur
What is the western Atlantic and eastern Pacific Oceans
500
The effect of this man-made chemical helps break down the ozone layer