Question

major theme connection: 1. using radioactive isotopes to determine the age of a fossil is known as radiometric dating. how might radiometric dating provide support for the theory of evolution by natural selection? hint—consider the age of fossils with respect to the overall fossil record (the entire collection of data regarding fossils and the age of earth). common thread connection: 1. “navy coffee” is where the coffee is brewed strong and a bit of salt is added. what is special about water that allows you to put sugar or salt in your coffee? to help answer this question, consider the opposite situation: why do salt scrubs that you buy in a high - end spa consist of large salt crystals in oil?

Explanation:

Major Theme Connection

Radiometric dating gives the age of fossils. By knowing the age - order of fossils, we can see the sequence of species' appearance and changes over time. This sequence supports the idea that species have evolved gradually through natural selection, as it shows the progression of life forms from simpler to more complex over geological time.

Water is a polar molecule. Polar substances like sugar and salt dissolve in water because of the attraction between the polar water molecules and the charged or polar parts of sugar/salt molecules. In contrast, oil is non - polar. Non - polar substances do not dissolve polar substances like salt. So salt remains as large crystals in oil in salt scrubs.

Answer:

Radiometric dating can determine the age - order of fossils. This age - order shows the sequence of species' appearance and evolution, providing evidence for the gradual change of species over time as proposed by the theory of evolution by natural selection.

Common Thread Connection