Measuring Age
What is one method for measuring the age of Earth?
What is radioactive dating?
What is the law of superposition?
What is the principle that states younger layers of rock lie above older layers?
What is radioactive dating?
What is a method to date materials using the decay of radioactive isotopes?
What does the law of superposition state?
What is in undisturbed layers of rock, the oldest layers are at the bottom?
How can the law of superposition help scientists?
What is it helps determine the relative ages of rock layers?
What is an isotope?
What is a variant of a chemical element with a different number of neutrons?
How does radioactive dating work?
What is by measuring the decay of radioactive isotopes in rocks?
Give an example of how sedimentary layers might show Earth's history.
What is different layers can show changes in the environment over time?
How do scientists use carbon-14 in dating?
What is by measuring the amount of carbon-14 remaining in organic materials?
Name a type of rock that can be dated using radioactive methods.
What is igneous rock?
What happens to older layers in sedimentary rock?
What is they are buried by younger layers?
What are the advantages of using radioactive dating?
What is it provides precise age estimates for rocks and fossils?
What is a half-life in radioactive dating?
What is the time it takes for half of a radioactive substance to decay?
Why is the law of superposition important for geologists?
What is it helps reconstruct the geological history of an area?
What is the significance of knowing the age of rocks?
What is it helps understand Earth's history and the timing of events?