1.
[08.02]
Which of the following best describes the changes involved in a fusion reaction? (1 point)
2.
[08.02]
Which of the following best describes a fission reaction involving lithium? (1 point)
|
Two lithium atoms form bonds with each other, absorbing a large amount of energy. |
|
|
The nuclei of lithium atoms join together to form heavier isotopes, and energy is released. |
|
|
An atom of lithium absorbs electrons, undergoes an increase in energy level, and splits into fragments. |
|
|
The nucleus of an atom of lithium splits, resulting in smaller fragments and the release of a large amount of energy. |
3.
[08.02]
Which of the following best describes a safety precaution needed in nuclear power plants? (1 point)
|
Scrubbers are built on smokestacks to prevent radioactive atmospheric pollution. |
|
|
Proper ventilation allows the radioactive by-products of reactions to escape, preventing explosions. |
|
|
Two separate water chambers are used to prevent radioactivity from reaching the outside environment. |
|
|
Employees must sign waivers that prevent them from suing the power plants in the case of accidental exposure to radioactivity. |
4.
[08.03]
Which of the following natural resources does not contribute to air pollution? (1 point)
|
coal |
|
|
natural gas |
|
|
nuclear power |
|
|
oil |
5.
[08.03]
Which of the following statements about natural resources is correct? (1 point)
|
Solar power has a low efficiency. |
|
|
Natural gas contributes to acid rain. |
|
|
Nuclear power contributes to global warming. |
|
|
Hydropower produces pollution and harmful chemicals. |
6.
[08.03]
Which of the following natural resources is considered renewable? (1 point)
|
biofuel |
|
|
natural gas |
|
|
nuclear power |
|
|
oil |
7.
[08.03]
Heat energy beneath the Earth’s surface heats underground water into
steam to operate steam turbines. This describes which of the following
resources? (1 point)
|
biofuel |
|
|
geothermal power |
|
|
hydropower |
|
|
nuclear power |
8.
[08.04]
Crude oil is created from natural processes occurring continuously.
Why, if crude oil can be made continuously in nature, is it considered a
non-renewable resource? (1 point)
|
Oil is very expensive. |
|
|
Use of oil outpaces the natural formation. |
|
|
Society is attempting to move away from oil use. |
|
|
The reactants that form oil are quickly running out. |
9.
[08.04]
Which of the following is the reason that alternative renewable
resources have not replaced fossil fuels in generating all the
electricity that we use? (1 point)
|
They have very expensive operating costs. |
|
|
They produce harmful environmental by-products. |
|
|
Society is unwilling to use alternative energy sources. |
|
|
They are not yet able to meet the massive demand for energy. |
10.
[08.04]
Which of the following is an example of how technology can help protect the environment? (1 point)
|
sonar for finding natural gas |
|
|
high powered ocean-floor drills |
|
|
compact fluorescent light bulbs |
|
|
human hair for oil spill clean-up |
11.
[08.04]
Since 1915, chemical fertilizer has been mass produced for farming.
Which of the following is the main water pollution problem caused by
chemical fertilizer? (1 point)
|
increased carbon monoxide |
|
|
radioactive substances in the water |
|
|
increased nitrate and phosphate levels |
|
|
higher levels of bacteria, viruses, and protozoa |
12.
[08.04]
Which of the following human environmental accidents has had
devastating effects on groundwater, rivers, oceans, and lakes? (1 point)
|
harmful pesticides |
|
|
nuclear accidents |
|
|
ozone depletion |
|
|
oil spills |
13.
[08.04]
Which of the following is the best explanation as to why a
combination of renewable energy resources will be necessary to replace
fossil fuels? (1 point)
|
Alternative energy sources have higher than average operating costs. |
|
|
Electricity generated by alternative fuels has a very low electrical current. |
|
|
Society is skeptical of some of the alternative energy sources, so a variety is necessary. |
|
|
One alternative source is unable to meet the demand because of each source’s limitations. |
14.
[08.04]
Which of the following most correctly predicts the impact on the
environment if sustainable practices are not followed? (1 point)
|
The ecosystems of the world will be uniformly damaged, but they will rebound quickly. |
|
|
Natural resources will be depleted, and the negative impact may be too severe to recover. |
|
|
The environment will not be adversely affected because the ecosystem of the world is too large. |
|
|
Rain forests will be depleted, but the oceans will be preserved because of their geographical isolation. |
15.
[08.04]
A newly developed technology allows waste to be broken down into
separate elemental forms. The end products are a hydrogen-rich gas and a
solid, with very little greenhouse gases released. What is the best
explanation of why this type of technology has been developed? (1 point)
|
Scientists and engineers received a grant from the government. |
|
|
Science is a process, and new technologies are the end products. |
|
|
New technology will allow humans to continue to create waste at the same rates. |
|
|
Humans are running out of room in landfills and have limited options for making more. |
16.
[08.04]
Oil spills can have a devastating effect on ground water, soil
quality, and marine life. Based on this knowledge, what is the
appropriate action for society to take regarding oil? (1 point)
|
Because of the demand for oil, nothing should be done. |
|
|
Oil should be made illegal regardless of the energy demand. |
|
|
Better regulations and improved shipping should be developed and enforced. |
|
|
Finding someone to blame quickly helps everyone feel better about the future of oil. |
17.
[08.04]
Which of the following is the best explanation why compact
fluorescent bulbs have become increasingly popular over the past five
years? (1 point)
|
Incandescent bulbs emit an interesting color of light. |
|
|
Compact fluorescent bulbs are more visually appealing. |
|
|
Society has become more conscious of energy efficiency. |
|
|
Compact fluorescent bulbs are much cheaper to produce. |
18.
[08.04]
If a scientist discovers a new synthetic chemical that appears to
solve the environmental issues caused by burning fossil fuels, why
should society be extremely cautious when the new chemical is
manufactured? (1 point)
|
Many scientists just want to become rich and famous. |
|
|
The chemical may be too expensive to mass produce. |
|
|
A better alternative chemical may be just around the corner. |
|
|
The costs and benefits need to be weighed before manufacturing the chemical. |
19.
[08.04]
Fuel cell cars that use hydrogen as fuel have the potential to be
quiet, produce low emissions, and require less maintenance than gasoline
cars. What negative effect might hydrogen fuel have on the environment?
(1 point)
|
Society will drive more because the fuel is cheaper and more abundant. |
|
|
To produce the hydrogen, a fuel must be burned and emissions will be produced. |
|
|
More cars will be on the road because they will be cheaper and less costly to drive. |
|
|
Hydrogen is dangerous, and many vehicles will explode before technology becomes safe. |
20.
[08.05]
Which of the following is not true regarding carbon? (1 point)
|
Carbon 12 is radioactive. |
|
|
Carbon can form long chains and rings. |
|
|
Carbon will bond with other carbon atoms. |
|
|
Carbon will readily bond with hydrogen and oxygen. |
21.
[08.05]
Carbon naturally occurs in two forms: diamond and graphite. Which of
the following best explains why these two forms have very different
properties? (1 point)
|
The key difference is that diamonds have other elements bonded within their structure. |
|
|
The differences are explained by the number of covalent and ionic bonds within each substance. |
|
|
The differences are explained by the density: graphite is very high and diamond is much lower. |
|
|
The differences are explained by how the carbon atoms within each substance are covalently bonded together. |
22.
[08.05]
Which of the following hydrocarbons is not possible if all the atoms have a full octet of electrons? (1 point)
|
|
|
|
|
|
|
|
|
|
|
23.
[08.06]
Which of the following molecules is one that biochemists are most likely to study? (1 point)
|
atmospheric ozone |
|
|
enzymes |
|
|
polyester |
|
|
silica |
24.
[08.06]
Which of the following would be the least likely to be controversial regarding biotechnology ethics? (1 point)
|
genetic tests revealing information about individuals to the public |
|
|
injecting diabetics with microorganisms that carry the insulin gene |
|
|
using genetic information in reproductive decision-making so parents can pick the attributes of children |
|
|
identifying individuals with genetic conditions so that insurance companies can be notified |
25.
[08.06]
Scientists have found that geckos hang from ceilings thanks to
millions of tiny hairs on their toes. Which of the following examples is
most likely a biotechnology development derived from studying the
gecko? (1 point)
|
adhesive tape |
|
|
reflective paint |
|
|
wall-walking robots |
|
|
hybrid-synthetic fibers |
New version available! (3.0.114)
0 comments