Answer:
They use them to figure out how the objects relate and what time period or place of origin the artifacts or fossils are from
Explanation:
scientists use index fossils to match rock layers. An index fossil must be widely distributed and represent a type of organism that existed only briefly. They are useful because they tell the relative ages of the rock layers they are found in. preserved by heat and pressure applied to the organism; only carbon is left.
Answer: He decided that the USA should go to the moon.
Explanation: In his speech "We choose to go to the moon" Kennedy showed his will to go the moon to compete with the USSR as part of the Space Race.
I don't think I can answer that because its on a test............
Sorry
