1. Which of the following are considered fossil fuels? Select the three correct answers.(1 point)
Responses
A. hydrogen
B. carbon
C. natural gas
D. oil
E. coal
2. Which fossil fuel is extracted by fracturing rocks?
A. coal
B. crude oil
C. natural gas
D. gasoline
3. What happens during coal formation after plants die and fall to the bottom of a swamp?
A. Sediment and rock pile on top.
B. Carbon-rich coal is formed.
C. Heat and pressure build up.
D. Overall plant growth declines.
4. How is coal extracted from the earth? Select the two correct answers.
A. by underground mining
B. by surface mining
C. by drilling wells
D. by hydraulic fracturing
E. by heating and boiling it
1. C. natural gas, D. oil, E. coal
2. C. natural gas
3. A. Sediment and rock pile on top, C. Heat and pressure build up.
4. A. by underground mining, and B. by surface mining.
1. C. natural gas, D. oil, E. coal
2. C. natural gas
3. A. Sediment and rock pile on top
4. A. by underground mining, and B. by
surface mining
100%
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1. To determine which of the options are considered fossil fuels, you need to understand what fossil fuels are. Fossil fuels are organic substances that have formed from the remains of ancient plants and animals over millions of years. They are typically rich in carbon and are used to generate energy.
To find the correct answers, analyze each option:
A. Hydrogen - Hydrogen is not a fossil fuel. It is an element that can be found in various compounds but is not derived from ancient organic material.
B. Carbon - Carbon is not a fossil fuel but a chemical element. However, fossil fuels do contain carbon as a major component.
C. Natural gas - Natural gas is a fossil fuel. It is primarily composed of methane and is derived from the decomposition of organic materials.
D. Oil - Oil is a fossil fuel. It forms from the remains of marine plants and animals that settled at the bottom of ancient oceans.
E. Coal - Coal is a fossil fuel. It is formed from the remains of plants that grew in swamps and forests millions of years ago.
Based on the explanations, the three correct answers for the first question are: C. natural gas, D. oil, and E. coal.
2. To identify the fossil fuel that is extracted by fracturing rocks, you need to understand the extraction methods used for different fuels.
A. Coal - Coal is not extracted by fracturing rocks. Coal mining involves either surface or underground mining techniques.
B. Crude oil - Crude oil is not extracted by fracturing rocks. It is usually extracted by drilling wells into underground reservoirs.
C. Natural gas - Natural gas is often extracted by a process called hydraulic fracturing, commonly known as fracking. It involves injecting water, sand, and chemicals into underground rock formations to release the trapped gas.
D. Gasoline - Gasoline is not a fossil fuel but a refined petroleum product used as a fuel.
Therefore, the correct answer for the second question is C. natural gas.
3. To understand what happens during coal formation after plants die and fall to the bottom of a swamp, you need to know the basic steps involved in coal formation.
A. Sediments and rock pile on top - After plant material falls to the bottom of a swamp, layers of sediment and rock eventually accumulate on top of it. This is an important step in the formation of coal but not the immediate result after plant death.
B. Carbon-rich coal is formed - As layers of sediment and rock pile on top of dead plant material, it undergoes a process called coalification. Pressure and heat from the overlying layers, combined with geological processes over millions of years, cause the plant material to transform into carbon-rich coal.
C. Heat and pressure build up - Heat and pressure gradually increase as sediments and rock layers accumulate on top of the dead plants. This leads to the physical and chemical changes necessary for coal formation.
D. Overall plant growth declines - This answer choice is unrelated to the coal formation process. Instead, it refers to a general decline in plant growth and is not specifically linked to the formation of coal.
Hence, the correct answer for the third question is B. Carbon-rich coal is formed.
4. To identify the methods used for extracting coal from the earth, it is important to have knowledge of coal mining techniques.
A. Underground mining - Coal can be extracted by digging tunnels and using machinery to extract the coal from underground mines. This method is known as underground mining.
B. Surface mining - Coal can also be extracted by removing the top layers of soil and rock to access coal seams near the surface. This method is known as surface mining.
C. Drilling wells - Drilling wells is not a method used for extracting coal. It is commonly used for extracting oil and gas.
D. Hydraulic fracturing - Hydraulic fracturing, or fracking, is not used for extracting coal. It is a method primarily used for extracting natural gas and oil.
E. Heating and boiling - Heating and boiling are not methods used for extracting coal. These actions are used in various processes such as refining, purification, and heating coal for energy purposes.
Therefore, the correct answers for the fourth question are A. by underground mining and B. by surface mining.