How would a geologist use absolute dating to determine the age of sedimentary layers? a. by dating the age of several radioactive elements in a sedimentary rock layer b. by dating the age of intrusions and extrusions near a sedimentary rock layer c. by comparing the relative ages of several sedimentary rock layers d. by identifying fossils in nearby intrusion and extrusions and determining their age

The picture shows a location in india that is very dry and arid. notice the tall mountains in the background; you can find high amounts of vegetation on the other side of the mountains. which statement is most likely true for this area?

One student group hypothesized that the dry baker's yeast must be alive. the temperature change, odor, and bubble foation, they said, indicated whych characteristic of life

Waste water from industries and domestic sources can be treated by chlorination or ultraviolet radiation. there are pros and cons to using either chlorine or uv radiation to kill harmful microorganisms. what is one reason chlorination would be preferred over ultraviolet radiation? a) chlorine only eliminates visible impurities and is ineffective against microorganisms. b) chlorine not only kills bacteria but provides a residual effect on returning microorganisms. c) uv radiation can be used only to treat drinking water and is ineffective in treating waste water. d) ultraviolet radiation is more effective