The half-life of radioactive parent isotope Q is 1000 million years. Scientists testing a rock sample discover that the sample contains three times as many daughter isotopes as parent isotopes. What is the age of the rock?
- 1,000 million years
- 2,000 million years
- 3,000 million years
- 4,000 million years
2,000 million years
Environmental & Atmospheric Sciences
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What will be an ideal response?
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Indicate whether the statement is true or false.
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Important marine autotrophs that have silica incorporated into their cell walls are ________
A) coccolithophorids B) cyanobacteria C) diatoms D) dinoflagellates E) radiolarians
Environmental & Atmospheric Sciences
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Fill in the blanks with correct word
Environmental & Atmospheric Sciences