Which of the following is defined as determining the relative order of past events, without necessarily determining the exact age?

• relative dating
• absolute dating

In what type of rocks are fossils found?

• igneous
• metamorphic
• sedimentary

Which of the following determines a specific date for a fossil using chemical information?

• absolute dating
• relative dating

Which of the following is a method used to determine the age of rocks using the rate of decay of radioactive isotopes?

• Principle of superposition
• Radiometric dating
• Relative dating
• Principle of cross-cutting relations

What mechanism did Darwin propose for evolution?

• natural selection
• fossil record
• use it or lose it
• biochemistry

Which of the following pieces of evolution evidence deals with aged and identified fossils?

• fossil record
• comparative embryology
• comparative biochemistry
• comparative anatomy

The forelimbs of penguin, alligator, bat, human are which of the following?

• homologous structures
• vestigial structures

In layers of sedimentary rock, the _________ layer is usually at the bottom. Each higher layer is _________ than the layers below it.

• oldest, younger
• youngest, older
• youngest, younger
• oldest, older

What percent of the original parent atoms remain in a rock after one half-life has gone by?

• 100%

• 75%

• 50%

• 25%

Most elements exist in more than one form. Each form must have the same number of protons. This is what makes them the same element. But - they can have different numbers of neutrons. Often, heavier forms are radioactive and lighter forms are stable (Carbon-14 versus Carbon-12). These different forms of the same element are called ___.

• isoforms

• isotopes

• sister forms