plants and animals that became buried under sediments millions of years ago, then slowly transformed into deposits of carbon-rich substances, such as coal, petroleum, and natural gas
fossil fuel
Earth's outer layer of solid rock
crust
a material such as soil or water that comes from the natural environment
natural resource
an opening in the Earth's crust where lava, cinders, ash, and gases come to the surface
volcano
melted rock BELOW the Earth's surface
magma
a resource that naturally replenished continuously and quickly, such as sunlight, water, and air
renewable resource
an alternative energy source from the sun that drives the water cycle and produces wind, ocean waves, and flowing water in rivers and streams
solar energy
a sudden movement of Earth's crust along a fault
earthquake
the sudden movement of earth materials down a slope
landslide or mudslide
a large amount of water flowing over land that is usually dry
flood
a resource that is not replenished because it takes extended geological periods to form such as rocks, minerals, and fossil fuels
nonrenewable resource
melted rock erupting onto the Earth's surface from a volcano
lava
alternatice energy source that comes from hte internal heat of the earth
geothermal power
an alternative energy source that uses the power of the wind
wind power
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