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They can also be obtained from carbonate deposits such as tufa, calcite, marl, dissolved carbon dioxide, and carbonates in ocean, lake and groundwater sources.

Ionization Inverse Square Law Interaction of RT/Matter Attenuation Coefficient Half-Value Layer Sources of Attenuation -Compton Scattering Geometric Unsharpness Filters in Radiography Scatter/Radiation Control Radiation Safety Radio-carbon dating is a method of obtaining age estimates on organic materials.

The word "estimates" is used because there is a significant amount of uncertainty in these measurements.

Radiation counters are used to detect the electrons given off by decaying C-14 as it turns into nitrogen.

The amount of C-14 is compared to the amount of C-12, the stable form of carbon, to determine how much radiocarbon has decayed, thereby dating the artifact.

Some of those sugars are made into long chain molecules like cellulose, which makes up most of the woody, pulpy portion of trees and plants.

Carbon dioxide gas also dissolves in water, sometimes forming carbonic acid.

The term ‘half-life’ refers to the amount of time it takes for half of a sample’s radioactive isotopes to turn into a stable isotopes.

We can determine the half life of an isotope by measuring how much radiation a sample produces over a given time period from a known number of radioactive atoms.

Pancakes are often rolled up or folded and eaten hot with a sweet or savoury filling inside .