Earth and Air Crossword Puzzle
Download and print this Earth and Air crossword puzzle. Use a pencil or pen to complete the puzzle by filling in the blanks. The completed answers are included, so you can easily check your progress.
PDF will include puzzle sheet and the answer key.
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Mother Earth
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QUESTIONS LIST:
- sediment : the solid sludge layer at the bottom of the tank
- aerobic : digestion carried out by microorganisms in the presence of air
- potable : water that is safe to drink
- boiling point : for water this is 100oc
- filtering : removes solid particulates
- sterilization : process which uses uv, ozone or chlorine
- desalination : the process in which salt is removed
- distillation : requires high temperature to boil water
- reverse osmosis : removes salt using high pressure
- crude oil : formed millions of years ago from plankton
- coal : formed millions of years ago from dead plants
- carbon footprint : the amount of carbon dioxide released during a products lifetime
- acid rain : nitrogen oxides and sulfur oxides form this
- combustion : reaction in which fuels react with oxygen
