Question

question 1
why is an index fossil so important for the fossil record?
check my answer
question 2
order the geologic time periods from smallest to largest. why is this organization important?
check my answer
question 3
whats the difference between relative and absolute dating?

Explanation:

Question 1: Index fossils are important as they are widespread geographically, abundant, and lived for a relatively short - time period. They help in dating rock layers and correlating rock sequences across different locations.
Question 2: The geologic time periods from smallest to largest are epoch, period, era, eon. This organization is important for understanding the history of life on Earth, as different time periods are characterized by distinct biological, geological, and climatic events.
Question 3: Relative dating determines the order of events in a sequence, such as which rock layer is older or younger than another, based on principles like superposition. Absolute dating, on the other hand, gives a numerical age (in years) to a rock or fossil, often using radiometric dating techniques.

Answer:

Question 1: Index fossils are important for dating rock layers and correlating rock sequences due to their wide - spread, abundant, and short - lived nature.
Question 2: Epoch, period, era, eon. It helps in understanding Earth's life history and associated events.
Question 3: Relative dating determines the order of events, while absolute dating gives a numerical age.