A. decomposition rate
B. relative age
C. absolute age
D. mineral makeup
2006-07-01 20:35:50 · 20 answers · asked by beth l 1 in Science & Mathematics ➔ Earth Sciences & Geology
do your own school work
2006-07-01 20:40:36 · answer #1 · answered by Anonymous · 0⤊ 2⤋
B.
There are various other radiometric dating methods used today to give ages of millions or billions of years for rocks. These techniques, unlike carbon dating, mostly use the relative concentrations of parent and daughter products in radioactive decay chains. For example, potassium-40 decays to argon-40; uranium-238 decays to lead-206 via other elements like radium; uranium-235 decays to lead-207; rubidium-87 decays to strontium-87; etc. These techniques are applied to igneous rocks, and are normally seen as giving the time since solidification.
The isotope concentrations can be measured very accurately, but isotope concentrations are not dates. To derive ages from such measurements, unprovable assumptions have to be made such as:
The starting conditions are known (for example, that there was no daughter isotope present at the start, or that we know how much was there).
Decay rates have always been constant.
Systems were closed or isolated so that no parent or daughter isotopes were lost or added.
2006-07-01 20:48:03 · answer #2 · answered by Inquisitive guy 2 · 0⤊ 0⤋
D. Mineral Makeup
2006-07-01 20:39:21 · answer #3 · answered by heavymetalluvr69r@sbcglobal.net 1 · 0⤊ 0⤋
B relative age
2006-07-01 20:44:36 · answer #4 · answered by shah 1 · 0⤊ 0⤋
C. this is called carbon dating for the age is determined by observing the the amount of carbon 14 in the rock if you want total explanation ask question about this and if i see it i will try to answer.
2006-07-01 20:40:38 · answer #5 · answered by god 2 · 0⤊ 0⤋
rocks don't decompose, they are inorganic....(A)
you can't say how old a rock is, only when the last time something changed the properties of that rock, such as erosion and tectonic shifting.....(B)
How does one tell the absolute age of a rock?? Weren't they around at the start of it all? With the exception of meteors....(C)
All radioactive testing would tell you about a rock is how much radioactive material it contained, or how much radiation it had been in contact with.....(D)
So, now that I am thoroughly confused, plz tell me the answer, lol
2006-07-02 02:11:09 · answer #6 · answered by Mike G 3 · 0⤊ 0⤋
i could say C. whilst a rock is made, from lava cooling or despite, it has a undeniable volume of radioactive factors in it. via measuring the quantity of those factors, evaluating it to the predicted volume, and employing the a million/2 existence of that element, you may get approximately how previous the rock is. the caveat is each and every time it gets melted and reforms, the clock gets reset.
2016-11-01 02:03:35 · answer #7 · answered by ? 4 · 0⤊ 0⤋
B. relative age.
2006-07-01 20:38:28 · answer #8 · answered by talk 2 me 2 · 0⤊ 0⤋
C. absolute age
2006-07-01 20:36:18 · answer #9 · answered by Anonymous · 0⤊ 0⤋
ill say both A and B,a half life of a element help in calculating age of that perticular sample and also it helps us in asumin that for how much time that elements is going to survive in it's native state
2006-07-01 20:52:54 · answer #10 · answered by Anonymous · 0⤊ 0⤋
B. Relative Age.
yeah, Radio-Carbon Dating it is!
2006-07-01 20:39:17 · answer #11 · answered by akhil sasidharan 2 · 0⤊ 0⤋