Fossils - Page 3
Questions
- The half-life of carbon-14 is 5730 years. What percentage of carbon-14 remains in a sample after 7 half lives?
- Why are fossils formed in sedimentary rocks?
- Fossils of Glossopteris, a type of fern, are found in Antarctica. How does this support the theory that the continents have moved over time?
- What makes radioisotopes useful for dating objects?
- Why are most fossils found in sedimentary rocks?
- Why is the fossil record of the horse particularly important to the theory of evolution?
- What is permineralization and how is it important for the preservation of fossils?
- What do scientist use to determine the geological time scale?
- What are transitional fossils and why are they important to the fossil record?
- What are the different types of fossils?
- What are the typical conditions necessary for fossii formation?
- Suppose a bone from an ancient human contains 16.5% of the C-14 found in living organisms. How old is the bone? Please help; thank you so much!!?
- How do most fossils form?
- What do scientists use to date the exact age of fossils?
- You find a deposit of organic limestone. In what type of setting did it probably form?
- How come organisms that are able to resist the stresses of desert life are rare in milder environments?
- In what type of rock do fossils usually form in?
- How is an index fossil useful to geologists in establishing the age of the rock layer in which they find it?
- In which of the three rock layers would you expect to find fossils of an organism that went extinct before the marine organism evolved?
- Imagine that you found a Tropites fossil. How old is the rock surrounding it?