less developed countires use what as thier main fuel source?
what gas is made when animal waste is broken down on farms to from energy?
2 main crops growm fro enery use?
corn and sugar cane
3 gorges dam
largest hydroelectric dam in the world
chloro floro carbon
people put on thier roofs to trap solar power
negative effects of building wind turbines?
they need to be built in an area with lots of wind. birds die when they fly thorugh it.
worlds most abundant fossil fuel
c6 h12 06 ->2c2h5oh+2c02+energy
cases that cause global warming
methane and c02 ( greenhouse gases)
viscosity is the reluctance of a liquid to flow. water has a low viscosity, while syrup has a high viscosity.
specific heat capacity
the time it takes for a liquid to heat and cool. water has a high shc meaning it takes a long time to heat and cool.
d=mXv waters density is 1g/cm3
when things like nitrates and phospates are added into bodies of water in too much quantity and spark the growth of too much algae the algaes up all the oxegyn int eh water adn causes marine life to suffocate
when water on the surface of an object is being pulled only downwards not up, so if carefully placed, something with a higher density than water can rest on top of water ( like insects) because of the tension on the surface ( surface tenion)
force of attraction between a hydren atom of one molecule of water and the oxegyn, nitrogen or fourine.
what are the five major stepsin water purification
screening filtration settling florination and chlorination
the trasformation froma gas to a liquid.an example would be water on the outside of a glass.
the transformation froma gas to a solid without going through the liquid phase. an example is dry ice (solid co2)
he percentage of salt in water or a liquid, a human can comsume water with a percentage of 2.2% and oceans have 3.5
2 ways to reduce the amount of salt in water
1. distill it 2.freezing
boiling point of water C
freezing point of water in C
biological oxegyn demand
enviormental protectian agency
organization of petroleum exporting countries
food and drug administration
describe an unusual property of water when it freezes
an ususual property of water when it freexes is that it expands and that it is less dense when it is in its solid form.
what is the name of the illness associated with high levels of mercury in the fish in japan?
what is a saturated solution
a solution that cannot dissolve anymore solute
what contains more oxegyn- warm wter or cold water
water is known as the _____ solvent becuase it dissolves more substances
the human kidneys are unable to concentrate more than a ___ salt in the urine.
what are the three main components on urine
salt water urea
what material do marine animals use to make their shells?
degine alloy and give an example?
an alloy is a compound that contains 2 or more different metals . an example is steel which contans cobalt nickel and iron.
name 2 gases that are very harmful which are found in car exhausts?
nitrogen dioxide and carbon monoxide
a substance that will funny break down into the earth adn example is frut and vegetable skin
what is the differnece between adsorbtion and absorption?
absorption is when something is being pushed into the substance absorbing. an example is a sponge. adsorption it when water attaches to the surface of an object.
why do icebergs contain very little salt?
icebergs contain very little salt because when you freeze something it decreases the amount of salt in the substance and becuase icebergs are cold they have little salt.
name the two most common sources that are responsible for the rapid overgrowth of algae in rivers and lakes
phosphates and nitrates
what process would you use in the lab to separate soil and water?
what process would you use in the lab to separate alcohol and water?
a person must undergo ______ if thier kidneys fail while they wait for a kidney transplant.
the pH of acidic water is ___ than 7
what is the name of the device found in the exhaust of a car that removes nitrogen oxide and carbon monoxide from the car exhaust fumes
decayed animals plants and microoganisms from millions of years ago
3 examples of fossil fuels
oil coal and natural gas
what is the major sourc of energy for every ecosysten
the first fossil fuel
the invention of the_____ was central to the industrial revolution
list three other industries that flourished due to the automobile industry
steel oil and coal.
oil removed from the ground?
in tokyo, what much a buyer prove before they can buy a car
they must prove that they have a place to park it
which country uses the most energy per capita?
which country uses the most energy for transportation needs