energy sources Flashcards
Three advantages to using biomass as fuel are
it has large potential in some areas,
plantations can help restore lands that are degraded
it can make use of agricultural and urban waste products
What is the best free energy source?
Solar
What is the main leading source of renewable energy?
hydropower
Wind power and water power both generate electricity by turning ____ _________ and _____ ______
turbines and generators
___ is not a benefit to using geothermal energy.
non-toxic emissions turn into water vapor
A very controversial form of energy is ________________ power.
nuclear
One of the benefits to conventional oil is _______________
it has a high net energy yield
_____ is not an advantage of nuclear power
there is a high net energy yield
Some of the problems with coal include ______________________.
it has high CO2 emissions when it is burned,
it is a severe threat to human health
Synthetic fuels are ________- made energy sources
man
what is weathering?
the changing of rocks at the Earth’s surface due to exposure to certain variables
when water freezes it expands
10%
The heating and cooling of rocks causes them to expand and contract. When this happens, pieces of rock flake off in a process called _________________________. It can also happen from pressure being released on the surface.
exfoliation
carbonic acid
is a weak acid that occurs naturally
A marble statue is in a botanical garden near a factory that produces sulfur dioxide. What will most likely happen to the statue over time?
the statue will start to deteriorate due to the effects of acid rain
What are two forms of physical weathering?
wind and gravity
Underground caves form from ________________________.
water seeping down, forming carbonic acid, dissolving the limestone
In what type of environment would limestone be chemically weathered?
moist and hot; moist and cold
When lichen and moss grow on rocks they begin the process of ____________.
biological weathering due to pressure
How do giant piles of rounded rock form?
they get cracks from freeze - thaw cycles;
they become more rounded through exfoliation;
clay minerals in the rock wash away;
they experience ice wedging;
flash floods wash away the rock debris in between;
wind blows away smaller fragments
