Carbon Dating: Unlocking the Secrets of Fossil Age

The video explains how scientists determine the age of fossils using carbon dating. It begins by comparing methods for dating people and trees, then introduces the concept of carbon isotopes, specifically Carbon 12 and Carbon 14. Carbon 14 is unstable and decays over time, allowing scientists to measure the ratio of Carbon 14 to Carbon 12 to estimate the age of fossils. The video also discusses the limitations of carbon dating, which is effective for fossils up to 60,000 years old, and mentions alternative methods for older fossils.

What method do scientists use to determine the age of fossils?

• Analyzing carbon atom ratios

• Measuring cosmic ray exposure

• Examining birth certificates

• Counting tree rings

How do animals acquire carbon?

• By absorbing it from the atmosphere

• By consuming plants

• By photosynthesis

• By drinking water

What is the unique characteristic of Carbon 14?

• It is found only in plants

• It is stable

• It is unstable

• It has six protons and six neutrons

What happens to Carbon 14 in an organism after it dies?

• It transforms into Carbon 12

• It decays into nitrogen

• It increases

• It remains constant

What is the half-life of Carbon 14?

• 1,000 years

• 5,730 years

• 60,000 years

• 10,000 years

How much Carbon 14 remains after two half-lives?

• Half

• A quarter

• None

• An eighth

Up to what age can carbon dating accurately date fossils?

• 100,000 years

• 60,000 years

• 30,000 years

• 10,000 years

What do scientists use to date fossils older than 60,000 years?

• Cosmic rays

• Carbon 12

• Elements with longer half-lives

• Tree rings