4. It makes the resource available for use
Using the principle of faunal succession, if an unidentified fossil is found in the same rock layer as an index fossil, the two species must have existed during the same period of time (Figure 4). If the same index fossil is found in different areas, the strata in each area were likely deposited at the same time.
<span>A fossil leaf that is made only of carbon preserved between two rock layers is called carbon film fossil.
</span>Characteristic of the carbon film fossils is that they are primarily composed of carbon. The fossil leaf has usually lost <span>internal components (cell walls and internal cell structures ).</span>
Whats wrong with this experiment is that this student put two different independent variables in the experiment. The first one being that he put five seed pots with detergent and the other 5 not, the second one is that he put five of the pots in the shade and the other five in the sun. This students results will not be very accurate.
