CLIMATE CHANGE
Which statement below best summarizes the overall purpose of the light-dependent reactions?
The light-dependent reactions capture the energy from the sun and transfer it to high-energy molecules.
Methane versus carbon dioxide are very important greenhouse gases. However, methane can retain and release about ____ times more heat than carbon dioxide.
30
Scientists studying global warming have noted an unusual trend in carbon dioxide level. Which of the following statements explains the trend of carbon dioxide in the atmosphere?
The rise in carbon dioxide levels have occurred relatively rapidly.
Which of the following terms, encompasses all the others?
climate change
In the carbon cycle, the process of photosynthesis ______ atmospheric CO2, and cellular respiration ______ atmospheric CO2.
consumes; produces
Coal is a fossil fuel that results from pressure being exerted on plant and animal decay for millions of years. Oil and natural gas are also fossil fuels except they
formed from microscopic plants and animals
A carbon atom can form a max of up to _______ bonds with other atoms.
four
Carbon cycles naturally between
geologic and atmospheric reservoirs and living organisms.
Which source of alternative energy relies on heated water close the Earth's surface and is used to supply 90% of the electricity needs in Iceland?
geothermal
One way to remove excess carbon dioxide from the atmosphere
is through reforestation.
Which of the following is a vector for malaria?
mosquitos
Which of the following sources of alternative energy involves using uranium or other materials to split the nucleus of an atom?
nuclear energy
Carbon sinks are reservoirs that hold large amounts of carbon. Which of the following are considered to be carbon sinks?
oceans, fossil fuels under ground, the atmosphere
Which of the following is an alternative energy source?
solar power
As climate change continues, which of the following is likely to occur?
vectors will expand their ranges. the number of invasive species will increase. more plants and animals will go extinct.
The most abundant greenhouse gas in the atmosphere is
water vapor
Fossil fuels are used for approximately ______ of the United States' energy needs.
80%
When it comes to the carbon footprint, because of its required usage of land, ______ is the most costly food source.
beef
The worldwide increase in average surface temperatures of Earth is called _________
global warming
______ is a product of photosynthesis and is a carbon-based molecule that is the chief source of energy for most organisms.
glucose (sugar)
The use of fertilizers contributes to which greenhouse gas to the atmosphere?
nitrous oxides
Even though there are alternate energy sources, fossil fuels are used for approximately ______ of the United States energy needs.
80%
Which of the following describes an investigation performed by ecologists interested in studying the biosphere?
A study measuring the levels of oxygen, carbon dioxide, and trace gases in the atmosphere over different seasons
As global temperatures increase, which of the following scenarios are most likely to happen?
Glaciers and snow coverage decrease.
Which part of solar energy is important in photosynthesis?
The visible light spectrum
Fires and volcanic activity are natural events that produce _____.
carbon dioxide
The measure of the impact on climate change by a person or a company is known as their
carbon footprint
Lionfish have been introduced to the Caribbean where they are not native and have impacted the natural food chain. This is an example of a negative impact at the
community of population level (idk)
The light reactions of photosynthesis occur within the ______ of the chloroplast and the Calvin cycle reactions occur within the ______ of the chloroplast.
thylakoid; stroma
Which of the following statements correctly explains the greenhouse effect?
Greenhouse gases absorb infrared radiation emitted by the planet's surface. This trapped heat energy is released slowly back into the atmosphere.