brainpop carbon dating

. How is an isotope different from the standard form of a chemical element?

• It has a different number of protons

• It has a different number of neutrons.

• . It has a different number of electrons

• . It has a different number of positrons

Which of the following best describes the nucleus of an atom of carbon-14?

• Four protons, 10 neutrons

• Six protons, eight neutrons

• Eight protons, six neutrons

• 10 protons, four neutrons

What is radioactive decay?

• The physical wear and tear that ancient artifacts exhibit over long periods of time.

• The ability of radioactive atoms to destroy other atoms.

• The effect of exposing radioactive material to the human body.

• The ability of radioactive elements to decay into different elements over time.

5. What is the relationship between carbon-14 and nitrogen?

• Nitrogen and carbon-14 react to form radioactive elements.

• Over time, nitrogen becomes carbon-14

• Over time, carbon-14 becomes nitrogen.

• Carbon-14 can be used to date ancient nitrogen.

Let's say you have a sample of 10 milligrams of carbon-14. How many milligrams will you have in 5,700 years?

• 5 mg

• 10 mg

• 0 mg

• 20 mg

How much carbon-14 do you have in your system today, compared with the amount you had when you were born?

• More

• Less

• The same amount

• None

What can you learn about an organism from the amount of carbon-14 in its remains?

• How long ago it died.

• What its diet consisted of

• Which biological kingdom it belonged to.

• Which living animals it's most closely related to

Which of the following items can be dated with carbon-14?

• vase

• diamond

• skeleton

• statue

Why can't carbon-14 dating be used on dinosaur remains? Choose the best answer.

• The remains of living creatures cannot be accurately dated with carbon-14.

• The carbon-14 isotope did not exist during the age of the dinosaurs.

• Dinosaurs were reptiles who had no carbon-14 in their systems

• Carbon dating is only accurate to 60,000 years ago-- well after the age of the dinosaurs.

To measure the age of a rock from the cretaceous what radioactive isotope would i use?

• c-14

• U-238

• K-19

• N-14