final part 2 Flashcards
which produces the LEAST amount of CO2 when burned?
natural gas
which has the potential to be dangerous for thousands of years?
natural gas
which fossil fuel produces the MOST CO2 when burned?
coal
which is currently the best choice for transportation?
oil products
highest concentration of energy
which is the MOST abundant fossil fuel?
coal
which is the BEST choice as an alternative to gasoline or diesel?
biofuels
which of the following is the main energy source for Iceland, which is on the mid-oceanic ridge?
geothermal
why are there so few places to place a dam for reservoirs and this hydroelectric power?
you need a valley with a good size river flowing through it
what is the major problem of using either solar or wind as an energy source?
they aren’t available 24 hours a day
what are three fossil fuels?
oil, coal & natural gas
what should the thermostat be set in the WINTER?
68
what should the thermostat be set at in the SUMMER?
78
what appliance is the biggest user of electricity in SUMMER?
air conditioner
what gas user is the most expensive on a cold day in the winter?
heater or furnace
how to keep the house temp. cool during a hot summer day and to keep electricity costs down??
close the windows and curtains to keep the sunlight out
in the SUMMER the best way to cool the house down for the next day is to?
open the windows
how can you reduce the cost of driving your car?
drive steady, drive less & get a car with better mpg
in natural selection which animals are able to pass on their genes to the next generation?
only their that survive and successfully mate
why don’t all individuals of a species look exactly the same?
because of mutation there is a huge variety of individuals
how is it decided which animals survive to reproduce to the next generation?
the environment decides
which was the longest period in time? Precambrian, Paleozoic, Mesozoic and Cenozoic
Precambrian
what happened during the PALEOZOIC era?
“old animal” this was when the first animals were around
what happened during the MESOZOIC era?
“middle animal” age of the dinosaurs
what happened during the CENOZOIC era?
this is the age of the mammals
where does the water for Oakley come from?
from the river which comes for the mountains
how many people live in California?
40 million
what percentage of rainfall falls on NORTHERN California?
75%
what percentage of the pop. of California is in SOUTHERN California?
2/3 about 67%
what can people do in their homes to cut down on water use?
stop watering lawns, shorter showers and flushing toilets so much
how do we send water down to Southern California?
California aqueduct
what happens to the salt content of the delta and SF Bay when the amount of fresh water from the mountains rivers slow down during the summer and early fall?
the delta becomes saltier
where is the water for Oakley cleaned up before sent to your home?
the treatment facility at Empire and Laurel
what are the three areas of need for water in California?
environment, cities, agriculture
which is the only reliable source of water left to supply us until the next winter?
reservoirs
which is the new source of water for the future?
conservation, recycling, maybe even desalination
how does groundwater get into the ground?
rain percolates into the ground
why in California is the level of groundwater getting lower all the time?
we are pumping out more water then what’s getting back in
describe the water cycle
water evaporates from the Ocean, forms a cloud, it rains, water flows into the ground, into rivers, into lakes and eventually back into the ocean
how old is the earth?
4.6 billion years
dinosaurs were alive on the earth for 160 million years. what percentage of the Earth’s history where they around?
approximately 3.5%
how Long was the earth without organisms big enough to see with your eye?
Little over 10%
how long have humans been around?
approximately 125,000 years or .003% of the Earth history
