plant biofuels and green tech
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/25
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
26 Terms
what is a biofuel
a fuel that contains energy from recent photosynthesis; renewable fuels produced from living organisms
what are fossil fuels
organic substances found in underground deposits formed in previous geologic periods and used for energy
what is coal
plant material that died but due to lack of oxygen no decomposition occured
dirtiest fossil fuel
coal
oil is a
liquid fossil fuel
natural gas is
the cleanest fossil fuel
sulfur dioxide comes from
burning coal
carbon monoxide comes from
fires, cars and other human sources
nitrogen oxide comes from
cars and power plants
hydrocarbons come from
80% natural resources, 20% from cars
the most commonly used
gasoline and disel
how much fuel is needed globally
9.8 billion barrels
alternatives for petroleum are needed because
limited supply, energy security, economic issues and environmental issues
what is acid rain
the acidic decomposition that occurs near or downwind of areas where there are major emission of sulfur dioxide and nitrogen oxides
why is acidic rain bad
changes the pH of soil and water, damages plants and animals
what is the greenhouse effect
when carbon dioxide and other greenhouse gases are released into the atmosphere from humans
example of greenhouse effect
when you leave your car windows closed in the summer sun
why is there more CO2 during the winter
photosynthesis occurs more in the summer which clears CO2
alternatives to fossil fuels
electric, hydrogen, bioethanol, biodiesels
corn ethanol as fuel
very energy insufficient
cellulosic ethanol
farm waste, wood chips, switchgrass
what is switchgrass
grass native to North America, provides high yield of biomass with low water/fertilizer use
bacterial enzymes are
used to help breakdown complex molecules; currently are too slow and expensive
biodiesel examples
soybean and canola vegetable oils
green algae benefits
grows fast, 30 times more energy per acre than other biofuels
how much of food is wasted or lost
30% or 2.8 trillion lbs