But carbon-14 dating won't work on dinosaur bones. The half-life of carbon-14 is only 5,730 years, so carbon-14 dating is only effective on samples that are less than 50,000 years old. Dinosaur bones, on the other hand, are millions of years old -- some fossils are billions of years old. To determine the ages of these specimens, scientists need an isotope with a very long half-life. Some of the isotopes used for this purpose are uranium-238, uranium-235 and potassium-40, each of which has a half-life of more than a million years.

5 0

4 years ago

In six–eight sentences, write a summary about the construction of composite images of celestial objects. Explain how they are ma

Softa [21]

Answer:Composite images that combine the data from different wavelengths, such as Chandra (X-ray), Hubble (optical) and Spitzer (infrared) provide an even more comprehensive analysis of the processes taking place within astronomical objects such as stars, galaxies and nebulas.

Explanation:nnn

8 0

3 years ago

When the offspring of a purple color flower and a white color flower were mated among themselves, there were 150 purple and 25 w

sergey [27]

Answer:

recessive allele

Explanation:

7 0

3 years ago

Which of the two types of cells, xylem or phloem, has the largest diameter

Ratling [72]

Answer:

Which of the two types of cells, xylem or phloem, has the largest diameter

XYLEM

Explanation:

Reason being that xylem has a larger conducting vessels which helps in the aggregation of its sapwood unlike phloem which has a lower conductivity area

7 0

3 years ago