Unit Test — Unit test Answers

Complex organisms with gills and lungs were major life forms that existed in the_____________.

Mineral replacement, carbon film and molds are a few examples of

Mammals evolved into larger organisms and began subdividing into various species in the _____________.

Shifts in the rock layer locations cannot account for gaps in the rock record

Eons, eras, periods, and epochs, are all examples of ____________time.

______________ can be used to date fossils in rocks to give an approximate age.

Please select the word from the list that best fits the definition

The change in environments that may have occurred at the end of the Paleozoic Era may have been caused by ____.

While examining layers of rock, a geologist states, “The sandstone is older than the limestone.” What has the geologist determined?

Isotopes of the same element will have a different number of neutrons, but the same number of protons.

Dog breeding is an example of natural selection.

Early land animals had to return to the water to reproduce.

Please select the word from the list that best fits the definition

Fossils most often form when a dead organism is buried in sediments.

Which of the following statement describes dinosaurs during the Mesozoic era?

To be a useful index fossil, a species must have been rare.

Index fossils are the remains of species that existed on Earth for relatively short periods of time.

____ is a process by which organisms with characteristics suited to the environment will survive and reproduce.

Dinosaurs were the dominant land animal of the Mesozoic Era.

Radiocarbon dating would be useful in dating the age of Earth.