Earth 2nd Semester Final Part 2

If a scientist is trying to date a sedimentary rock, what could help him determine its approximate age?

• a. index fossils found in the rock

• b. types of trees found in the area

• c. weather conditions in the area where the rock is found

• d. type of sedimentary rock

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NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Why are radioactive substances useful for measuring geologic time?

• a. Samples of radioactive substances are easy to

  collect from rocks.

• b. The half-lives of radioactive substances are

  short.

• c. Radioactive substances undergo decay at a predictable rate

• d. The ratio of decay products to radioactive

  
  

  substances remains constant in rocks.

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Fossils provide clues to

• a. recent events in human history

• b. past geologic events, climates, and evolution of living things

• c. past weather, cloud cover, and season changes

• d. the earliest development of the Solar System

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Almost all fossils are discovered in

• a. volcanic rock

• b. igneous rock

• c. sedimentary rock

• d. metamorphic rock

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NGSS.MS-LS4-1

If a fossil is present through many rock layers and then suddenly leaves the fossil record, what is this evidence of in the geologic history of this fossil?

• a. superposition

• b. uniformitarianism

• c. unconformity only

• d. extinction or unconformity

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NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Index fossils have usually formed from organisms which had a

• a. narrow geographic distribution and existed for only a short time

• b. wide geographic distribution and existed for only a short time

• c. wide geographic distribution and existed for a long time

• d. narrow geographic distribution and existed for a long time

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NGSS.MS-LS4-1

How have scientists determined the beginning and end of geologic eras?

• a. major changes in life forms based on fossils

• b. radioactive dating

• c. types of rocks

• d. volcanic events

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NGSS.MS-ESS1-4

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The index fossil to the Paleozoic is the trilobite. If you find a sedimentary rock that you believe is from the Paleozoic and it contains no trilobites, then:

• a. It cannot be Paleozoic

• b. It proves that the concept of Index fossils is wrong

• c. You did not look hard enough, there has to be one there, keep looking

• d. Realize that sometimes fossils are not preserved.

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NGSS.MS-ESS1-4

Which sequence correctly shows the appearance of animal species from first to last?

• a. reptiles, mammals, amphibians, fish

• b. mammals, reptiles, amphibians, fish

• c. fish, reptiles, mammals, amphibians

• d. fish, amphibians, reptiles, mammals

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NGSS.MS-LS4-1

A geologist is studying an undisturbed rock column. The introduction of the report will include a stratigraphic map of the column. Which law or principle will the geologist use to label the layers from oldest to youngest?

• a. Law of Original Horizontality

• b. Law of Superposition

• c. Law of Cross Cutting Relationships

• d. Principle of Uniformitarianism

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NGSS.MS-ESS1-4