Through the chart, those fossils that appear to be the same (or close to the same) as the fossils preceding them should be placed in a vertical line or column. During one of the earlier period, the fossils will split into two branches. In other words, one fossil from that period will show one type of change, and another fossil will show a different change. When this happens, place the fossils side by side in the appropriate time period; you will have two lineages. Once all the fossils have been placed correctly according to time and morphology, tape or glue the fossils in place. Analysis Give a brief description of the evolutionary changes that occurred in the organism over time. During which time period did the fossils differentiate into two branches? You find two different rocks, each one having a fossil as shown below. Which rock is older? How do you know? Index fossils are fossils that only appear within a narrow time range and are widely distributed. They can be used to date the rock layer they are found in because they only appeared within a narrow range of time. The following fossil could be considered an index fossil. Explain why it is considered an index fossil and what time period the rock it is found in would have to have formed. Examine the fossil that was unearthed in a museum, apparently, the labels and other information were lost. Using your fossil record, determine the time period this fossil is likely from. Explain your reasoning. Of the two major species that arose from the parent species, which was more successful? How do you know? For each of the on your fossil record, draw in what the organism appearance is likely to “blanks” be. Draw this directly on your fossil record. Fossils
Through the chart, those fossils that appear to be the same (or close to the same) as the fossils preceding them should be placed in a vertical line or column. During one of the earlier period, the fossils will split into two branches. In other words, one fossil from that period will show one type of change, and another fossil will show a different change. When this happens, place the fossils side by side in the appropriate time period; you will have two lineages. Once all the fossils have been placed correctly according to time and morphology, tape or glue the fossils in place. Analysis Give a brief description of the evolutionary changes that occurred in the organism over time. During which time period did the fossils differentiate into two branches? You find two different rocks, each one having a fossil as shown below. Which rock is older? How do you know? Index fossils are fossils that only appear within a narrow time range and are widely distributed. They can be used to date the rock layer they are found in because they only appeared within a narrow range of time. The following fossil could be considered an index fossil. Explain why it is considered an index fossil and what time period the rock it is found in would have to have formed. Examine the fossil that was unearthed in a museum, apparently, the labels and other information were lost. Using your fossil record, determine the time period this fossil is likely from. Explain your reasoning. Of the two major species that arose from the parent species, which was more successful? How do you know? For each of the “blanks” on your fossil record, draw in what the organism appearance is likely to be. Draw this directly on your fossil record. Fossils