Custom Isotopes and Carbon-14 Dating

The video tutorial guides viewers through the process of downloading and setting up a tool for dating objects using isotopes. It explains the use of carbon-14 and uranium-238 isotopes, and how to apply them to date various objects. The tutorial also covers the concept of custom isotopes and demonstrates how to use them for dating purposes, providing examples and practical applications.

What should you do if the download warning appears while accessing the lesson materials?

• Contact technical support.

• Ignore the warning and close the window.

• Click 'Keep' to proceed with the download.

• Restart your computer.

What does the 'custom' option in isotopes refer to?

• Using only carbon-14.

• Using only uranium-238.

• Selecting from unspecified isotopes.

• Creating a new isotope.

Why does a living tree show 100% of its original carbon-14?

• It is a fossil.

• It has no carbon-14 left.

• It is still alive and in balance with the atmosphere.

• It has been dead for a long time.

How can you estimate the age of a tree that has 97% of its original carbon-14?

• By using a different isotope.

• By assuming it is still alive.

• By using the green slider to match the percentage.

• By guessing the age.

Why doesn't carbon-14 dating work on rocks?

• Rocks contain no carbon.

• Rocks are made of uranium.

• Rocks are too young.

• Rocks have too much carbon-14.

What should you do if you see 0% when using carbon-14 on a sample?

• Increase the sample size.

• Try a different isotope.

• Use more carbon-14.

• Ignore the result.

What is the significance of using custom isotopes in dating?

• They are only used for living organisms.

• They allow for dating a wider range of materials.

• They are more accurate than carbon-14.

• They are less reliable than carbon-14.

How do you adjust the scale to estimate the age of a dinosaur skull?

• By using a fixed scale.

• By moving the scale to match the percentage of the isotope.

• By moving the scale to match 100%.

• By guessing the age.

What mistake might students make when entering the age of a dinosaur skull?

• Ignoring the percentage.

• Entering the age in years instead of millions of years.

• Using the wrong isotope.

• Not using the scale.

What is the correct way to express 154 million six hundred thousand years?

• 154.6 million years

• 1.546 million years

• 154,600,000 years

• 154.6 years