Some isotopes, however, decay slowly, and several of these are used as geologic clocks. Dating rocks by these radioactive timekeepers is simple in theory, but the laboratory procedures are complex. <span>All methods rely on the fact that certain elements (particularly uranium and potassium) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age.</span>
Diffraction effects
Both reflecting and refracting telescopes suffer from diffraction effects.
Telescopes are monocular optical instruments, usually used in astronomy and are designed for the observation of remote objects. Telescopes have magnification for observing distant objects and use an arrangement of curved mirrors, lenses, or different devices. The two main kinds of telescopes are reflectors and refractors telescopes. The two telescopes suffer from diffraction effects such as the appearance of a rainbow of colours around the image.
The answer is most likely oxidize. During oxidation reduction reactions, the loss of elections is called oxidation while the the gaining of elections is called reduction.
The best way how one could characterize and describe the study of ecology would be through B - the two-way relationship between a living and its small environment. Because this is the exact reason and thing that ecology is in essence.
The two specializations are reproduction and cell growth
