chapter 17 science
Terms in this set (36)
Nonrenewable energy souce formed from the remains of organisms that lived long ago
Where does most of the energy we use come from?
Are fossil fuels a natural resource?
What do we use fossil fuels for
Run cars, ships, planes
Factories 2 produce electricity
What are the 2 main probable a with fossil fuels?
The supply is limited
Obtaining them and using then have environmental consequences
Main 4 usage purposes of fuel
What does the durability of a fuel for each application Depend on?
Can electricity be transported?
2 disadvantages of electricity
Difficult to store
Other energy sources have to be used to generate it
Device that converts mechanical energy into electrical energy
How do generators produce electrical energy
By moving an electrically conductive material within a magnetic field
A wheel that changes the force of a moving gas of liquid u go energy that can do work
How does the turbine in an electric generator spin?
From the steam that gets releases from the boiling water
Do developed or developing countries use more energy?
4 main categories of energy use in US
Are fuel deposits distributed evenly?
Where do oil and natural gas result fron
The decay of tiny marine organisms that accumulated in the bottom of the ocean millions of years ago
What are most of the worlds fossil fuel reserves made up of?
Liquid mixture of complex hydrocarbon compounds that are used widely as a fuel source
What is petroleum oil also known as?
What accounts for 45% of the world commercial energy use
Where is oil most commonly found?
Does petroleum fuel release pollutants when burned?
Does natural gas produce more pollutants than other fossil fuels when burned?
No, they produce fewer
What % of energy do fossil fuels account for in developed countries?
Oil deposits that are discovered and are in commercial production
Where do nuclear power plants get their power from?
Energy released by a fission or fusion reaction
Nuclei of uranium atoms that are bombarded with atomic particles
What happens to nuclei during the process of nuclear fission?
Splitting of the nucleus of a large atom into 2 or more fragments
What is the heat released during nuclear reactions used for?
Do nuclear power plants release more or less radioactivity than coal fired power plants
Disadvantage of nuclear power?
Difficulty to find a safe place to store nuclear waste
Combination of the nuclei of small atoms to form a larger nucleus
What must 3 things must happen for fusion to occur
Atomic nuclei must be heated to high temps
Nuclei must be held at high conditions
Nuclei must be properly confined