Question

Which of the following statements is true? Choose one:

A. The generally accepted age of the Earth is 4.56 million years.
B. An unconformity is a break in the rock record indicating that the area was underwater for millions of years.
C. Varieties of an element that differ only in the number of neutrons are called isotopes.
D. A paleosol is a rock layer identified by such factors as rock type and approximate geologic age.

Answer 1

C. Varieties of an element that differ only in the number of neutrons are called isotopes.

Step-by-step explanation:

The Earth is approximately
`4.543* 10^(9)\ years` old. The solar system formed from giant gas clouds which was a part of the solar nebula.

The surface of soil which demarcates two soils of different geological ages is called a unconformity.

Palesol is the soil that lies between sediments or volcanic deposits. If the paleosol is older they have lithified rock.

Hence, option C is true.