Water in the form of gas
Water Vapor
Underground rock layers that water flows through
Aquifers
Moving streams of water that carry warm or cool water through the world’s oceans
Currents
Partly dry grasslands and prairies
Steepes
The practice of collecting water and distributing it to crops
Irrigation
Water goes from the oceans to the air to the ground and finally back to the oceans
Water Cycle
The unpredictable changes in air that take place over a short period of time
Weather
Patterns of wind caused by landforms in a particular area
Local Winds
When chemicals in air pollution combine with precipitation
Acid Rain
Powerful chemicals that kill crop-destroying insects
Pestisides
When the sun’s heat turns liquid water into water vapor
Evaporation
The usual, predictable pattern of weather in an area over a long period of time
A dry area on the side of the mountains facing away from the wind
Cutting down forests without replanting
Deforestation
Places where the plants and animals are dependent upon one another and their surroundings for survival
Ecosystems
Process where water vapor changes back into a liquid
Condensation
The low latitudes near the Equator
Tropics
Dense forests along the equator
Rain Forests
When farmers change what they plant in a field
Crop Rotation
What water has the most freshwater?
Groundwater
When water falls back to the earth in the form of rain, snow, sleep, hail
Precipitation
A long period of extreme dryness
Drought
Broad grasslands with few trees
Savannas
The careful use of resources so they are not wasted
Conservation
What are the four “spheres” of the earth?
Atmosphere, Lithosphere, Hydrosphere, Biosphere