investigate and analyse past and present technologies Flashcards
(7 cards)
1
Q
radiometric dating
A
calculates age of rocks and minerals
2
Q
radioactive isotopes
A
elements that have an unstable nucleus however overtime it decays and energy/ matter is released as radiation and the element becomes stable
3
Q
Radioactive decay
A
occurs in regular and measurable incrimints for each isotope
4
Q
carbon dating
A
dates organisms between 5730-50,000 yrs, carbon dating is a form of absolute dating
5
Q
Relative dating
A
use index fossils and rock stratigraphy to help date approx the fossils
6
Q
gas analysis
A
process of analyzing the composition of gas in the air
7
Q
what does gas analysis tell us
A
temp over time, rainfall, ocean volume, atmospheric circulating
