The half-life of radioactive parent isotope Q is 500 million years. Scientists testing a rock sample discover that the sample contains an equal number of daughter and parent isotopes. What is the age of the rock?
- 500 million
- 1000 million
- 1500 million
- 2000 million
500 million
Environmental & Atmospheric Sciences
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Approximately ________% of the fuel you pump into your automobile does something other than move your vehicle down the road
A) 85-90 B) 20-25 C) 35-45 D) 65-75 E) 55-65
Environmental & Atmospheric Sciences
Biodiversity is partially influenced by net primary productivity (NPP). Where can the highest terrestrial rates of NPP be found?
A) tropical rainforests B) deserts C) deciduous forests D) polar regions E) tundra
Environmental & Atmospheric Sciences
Compare and contrast water pollution issues in more-developed nations with those in less-developed nations. How can both types of countries improve their water use and water pollution issues?
What will be an ideal response?
Environmental & Atmospheric Sciences
Hydrothermal vents such as black smokers are found at spreading centers
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences