How is coal extracted from the earth? Select the two correct answers.(1 point)
Responses
by hydraulic fracturing
by hydraulic fracturing
by drilling wells
by drilling wells
by underground mining
by underground mining
by surface mining
by surface mining
by heating and boiling it
by heating and boiling it
by underground mining
by surface mining
Which of the following are considered fossil fuels? Select the three correct answers.(1 point)
Responses
oil
oil
hydrogen
hydrogen
coal
coal
carbon
carbon
natural gas
oil
coal
natural gas
What happens during coal formation after plants die and fall to the bottom of a swamp?(1 point)
Responses
Carbon-rich coal is formed.
Carbon-rich coal is formed.
Overall plant growth declines.
Overall plant growth declines.
Sediment and rock pile on top.
Sediment and rock pile on top.
Heat and pressure build up.
Heat and pressure build up.
Which fossil fuel is extracted by fracturing rocks?(1 point)
Responses
crude oil
crude oil
gasoline
gasoline
coal
coal
natural gas