Energy Sources Crossword Puzzle

QUESTIONS LIST:

• petroleum : also known as crude oil
• crude : _ oil is found in reservoirs in porous rock
• hydrocarbons : also known as fossil fuels
• porous : quality of some types of rock, like limestone and sandstone
• pores : tiny holes or empty spaces
• reservoir : a place where oil collects and stores
• nonrenewable : energy sources that form too slowly to replenish in a sustainable timeframe
• renewable : energy sources that continuously circulate rather than deplete
• seams : coal is formed from fossilized organic matter and found in layers or _
• fossil : _ fuels are a nonrenewable resource
• turbine : a wind _ is a large, modern windmill
• water : dams utilize flowing _ to turn a giant turbine and generate energy
• solar : the sun's energy
• photovoltaic : _ cells harvest solar energy
• photoelectric : the _ effect allows the absorption of photons of light and the release of electrons, which are captured and used to generate electric current
• passive : _ solar stores heat energy from the sun for later use