This printable crossword puzzle has 20 clues. Answers range from 4 to 26 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
The area of land that is drained by a river?
Earth's surface in sediment and rock water stored beneath the formations?
An underground formation that contains groundwater?
The area of the Earth's surface where water percolates down into the aquifer?
Fresh water on Earth's land surface?
The average weather conditions in an area over a long period of time?
The layer of the atmosphere at an altitude of 15 to 40 km?
A gas composed of molecules that absorb and radiate infrared radiation from the sun
The distance from the equator measured in degrees north or south?
Human made chemicals that may be damaging the ozone layer?
Long-term rise in the average temperature of the Earth's climate system?
When harmful substances build up in the air to unhealthy levels?
When primary pollutants react with other primary pollutants?
Fog?
When the air above is warmer than the air bellow this occurs?
Are the remains of ancient organisms that changed into coal, oil?
Is a machine that converts mechanical energy, or motion, into electrical energy?
A liquid mixture of complex hydrocarbon compounds?
The energy released by a fission or fusion reaction?
The amount of technically and economically recoverable oil?