Fossil Fuel Crossword Puzzle
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QUESTIONS LIST:
- fossil : formed from the remains of plants and animals from millions of years ago
- coal : dark/black sedimentary rock that is combustible
- plants : coal is formed from this organic matter.
- anthracite : highest rank and has the highest concentration of coal
- lignite : lowest rank and lowest carbon concentration coal.
- petroleum : referred to as crude oil/oil and converted to petrol / diesel
- russia : philippines imports crude oil and petroleum from this country.
- natural gas : primarily composed of methane and used for cooking, heating, and generating electricity
- transportation : petroleum is mainly as _ fuel.
- electricity : coal is primarily used to produce _ .
- methane : natural gas is primarily composed of _ .
- carboniferous : fossil fuel formed millions of years ago, primarily during the _ period
- temperature : natural gas forms at higher _ than oil.
