Natural Resources
Fossil Fuel: A ________________ energy source formed from ancient plants and __________ buried in Earth's crust for __ of year
Nonrenwable, animals, millions
Nuclear fission: the process in which the ___________________ of a radioactive atom is _________, forming lighter elements and releasing a _____________ amount of _______________
Nucleus, split, huge, energy
Recycling is only ________ of the solution to our ____________ problem
Part, resource
________________ resources are used to produce electricity and _________
Renewable, fuel
Wind energy is clean and ________________, but depends on strong winds blowing most of the time and wind farms take up a lot of _________--.
Renewable, land
The trash amount per person has ____________
Increased
Hydrogen is the ______________atom, is a flammable gas, and must be handled with _________.
Simplest, care
Example: Glass, _______________, cans, certain __________, paper
Aluminum, Plastic
Because hydroelectric power doesn't _______any fuel, it produces no ____________________.
Burn, pollution
Burning fossil fuels produces excess ______________, harmful acids, and other forms of _______________
Carbon dioxide, pollution
Minerals are found in _____, airplanes, tools, wires, and __________ chips
Cars, Computer
Fossil Fuels burn ___ and produce a lot of ____. They are used to run most of the ____ plants that generate___________.
Easily, heat, power,electricity
Nuclear waste will remain __________________ for thousands of years, so countries using it face the challenge of _____________ it safely
Fadioactive, storig
Wind _______are areas with hundreds of _______________.
Farms, windmills
Fossil Fuels are the most ______ used sources of energy, but _______________ power is also used to produce _______________
Commonly, nuclear, electricity
However, hydrogen fuel is very ____________and takes a great deal of energy, time, and _________.
Expensive, money
Conservation programs try to ____________ our natural resources, protect our _______, and slow the amount of _______produced.
Extend, health, trash
In nuclear power plants, nuclear ______ is used to__________ the water
Fission, heat
People can use _________water to produce electricity.
Flowing
Many of the products you use come from _____________________
Fossil fuels
Solar cells were created to ______the sun's ________.
Trap, energy
There are ____ ways to : ____________ cut back _________ use more than once
Two, Reduce, Reuse
Sunlight is an ____________source of ___________energy but current methods of collecting sunlight are __________and somewhat __________.
Unlimited, clean, expensive, inefficient
Nuclear power plants use ____________________ atoms as fuel
Uranium
Geothermal energy comes from underground _________that is heated by ______ ______.
Water, hot rock
Renewable resources provide only a ___________percentage of energy used because these resources can't produce enough ________to pay for the ________of developing them on a ______scale.
Small, energy, cost, large
When a uranium nucleus splits, it forms 2 __________ nuclei and releases a few neutrons and a large amount of _______________ in the form of light and ______________
Smaller, energy, heat
_______cell: a special ________device that converts light energy to __________.
Solar, layered, electricity
Hydrogen fuel cells are used to supply electrical energy on _____________and space stations and is being tested on other forms of ___________________.
Spacecraft, transportation
In a solar cell, when _________strikes the cell, __________move from the lower layer to the upper layer, producing an _______________current.
Sunlight, electrons, electrical
The energy in fossil fuels represents a form of stored _________, since ancient organisms depended on the _____
Sunlight, sun
The average ____________of the Earth are ___________, and the rate of increase is getting faster and ________________.
Temperatures, increasing, faster
Example: _____ is usedto build homes and to make furniture, utensils, and _________
Wood, Paper
Recycling invoves _______ and extending natural resource
reusing
People use natural resources make_______, build cities, _______their homes and make their lives more comfortable.
tools, heat
These energy sources are in __________supply and usually produce electricity or _______ with little or no ____________.
unlimited, heat, pollution
Hydroelectric energy: electricity produced by moving ________.
water
Sources of renewable energy are moving________, wind, Earth's internal heat, _____________, living matter, and hydrogen.
water, sunlight
For thousands of years, people have used ______energy to move ships, grind ___________, and pump water. Today, people use wind energy to generate ____________________.
wind, grain, electricity.
The modern _________is made of metal and plastic. The ___________turn a set of gears that drives the generator to produce __________.
windmill, blades,electricity
People also know that there are _____ AND _________ in using natural resources; for example, coal produces_____ but also _______ the air
cost, benefits, heat, pollutes
Natural resource: any _______source, organism, or substance found in _________ that people use.
energy, nature
These energy sources also help to preserve the ____________________________and protect human ___________.
environment, health
Nonrenewable resource: a natural resource that exists in a ____ amount or that is used up _______ than it can be __________ in nature
fixed, faster, replaced
Fossil fuels, ____________, and plants supply materials for modern products
minerals
Includes ______, coal, and natural ____
oil, gas
Biomass energy: ______________matter, like ____________(corn starch → ethanol) and animal ____________, that can be used as ______.
organic, plant, waste, fuel
Biomass ________stations burn ______and other plant material to produce electricity.
power, wood
Conservation means ___________, restoring, and ________natural resources so they last _________.
protecting, managing, longer
We need to _______ the amount of pollution.
reduce
Natural resources can be classified as ________ and _________________
renewable, nonrenewable
Although biomass is a _______________________resource, burning biomass can produce a lot of carbon dioxide (____________).
renewable, pollution
Renewable resource: a natural resource that can be ___________ in nature at about the ______________ as it is used
replaced, same rate
In the U.S., geothermal energy provides electricity for nearly ___________________ homes.
3.5 million
_____________ than fossil fuels
Cheaper
Hydrogen is a _______source of energy and produces ________and _________as byproducts.
Clean, water, heat
Building __________can cause problems for the environment by _____________wildlife habitats, interfering with ________________of fish, and making it harder to raise crops and livestock (some areas at the end of the river may receive ___________water).
Dams, destroying, migration, less
Fossil Fuels supply most of society's ___________
Energy
Natural Resources provede materials and
Energy
Recycling takes time, _________, and ____________, but can help extend available resources, and protect human ___ and the environment
Energy, money, health
Although nuclear fission produces a lot of ____________, it also produces radioactiv ____________ that can cause death and_____________ if living things are exposed to it long enough
Energy, waste, disease
In __________ fuel power plants, water is __________ to make ______ that turns a turbine, which drives a generator to make electricity, _________ fossil fuels (like wood or coal) _________ the water
Fossil, boiled, steam,burning, boil
Hydrogen is used in a hydrogen _______cell, which is a device that produces _________________by separating hydrogen into protons and ____________.
Fuel, electricity, electrons
It is caused by increase greenhouse _______(like _________ __________) in the atmosphere that ____heat and cause the Earth to __________up.
Gases, carbon dioxide, trap, heat
Geothermal Energy: energy produced by __________within Earth's ______.
Heat, crust
The supply of any nonrenweable resource is _____________----
Limited
The Earth does go through _____________warming and cooling cycles, but the current warming is happening too __and is too _________to be natural.
Natural, fast, extreme
Example: Oil is broken down into different parts that are used to make __________
Plastics
Factory waste can ________, air, _______, and soil
Pollute, water
Fossil fuels must be burned to generater______ for the factories and businessess that make thee _________
Power, Produts
Not every item can be ______ or reused
Recycled
Conervation involves _________waste and reusing _________ resources
Reducing, natural
Recycling: The __________ of materials that people would otherwise _______________
Reusing, throw away
Solar cells can be ______together in solar _____.
Wired, panels
Geothermal energy is _________and renewable but is _____________to areas where hot water is close to the _______________.
clean, limited, surface