ch. 13, and 14 study review
A sample of radioactive waste has a half-life of 20 years and an activity level of 4 curies. After how many years will the activity level of this sample be 0.50 curies?
60 years
Uranium-235 has a half-life of 710 million years. If a certain amount is considered safe after the radioactivity has dropped to 0.10 percent of the original level, how long must the uranium-235 be stored to be safe?
7.1 x 10^9 years because 710 x 10^6 = X. ( or 10 half lives)
what energy source leads to deforestation?
biomass
Hydroelectric power plants have many negative environmental impacts such as
destruction of fish habitats and migration
A problem associated with nuclear power plants is
disposal of radioactive waste
Which of the following energy sources is not made directly or indirectly from the sun?
geothermal
what energy source can be utilized in areas with volcanic activity?
geothermal
what energy source destroys landscapes by flooding them?
hydropower
What supplies the most commercial energy in the world today?
oil
In contrast to low-level radioactive waste, most high-level radioactive waste in the United States in currently
stored at reactor sites
compared to a coal-fired power plant, a nuclear power plant generates more
thermal pollution
what energy source can only be used in a few places in the world?
tidal
Which of the following metals is considered an energy resource?
uranium
what energy source has been linked to deaths of migratory birds?
wind power
