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Science Explainer: Dating fossils found in rock layers supports theory of human evolution

By Formative Staff
Last updated 4 months ago
3 Questions
Note from the author:
Read the passage Dating fossils found in rock layers supports theory of human evolution. Then answer the questions below.
Read the passage Dating fossils found in rock layers supports theory of human evolution. Then answer the questions below.
Required
Drag each answer choice into the correct space. Not all answer choices will be used.

Forms of an element that have the same number of ____________but a different number of neutrons in the nucleus of the element's atoms are called _____________.
Other Answer Choices:
protons
electrons
isotopes
fossils
Required

Drag each description into the correct box to show the dating method it describes.

  • compares decaying isotopes of an element to determine age
  • uses the elements carbon, potassium and argon
  • is difficult to use when surrounding rock is similar in color
  • uses location in the rock strata to determine age
  • Radiometric
  • Geological
Required

Which statements about dating techniques are true? Select two correct answers.