7th Grade Unit #7 Clues To Earth's Past Pre-Test and Practice

Which of the following statements accurately describes how absolute age differs from relative age?

• Absolute age is the age of a rock or fossil compared to other rocks or fossils, while relative age is the specific number of years since the rock or fossil formed.

• Absolute age is the specific number of years since a rock or fossil formed, while relative age is the age of a rock or fossil compared to others.

• Absolute age refers to the appearance of a rock or fossil, while relative age refers to its location.

• Absolute age and relative age are the same and can be used interchangeably.

The Earth is estimated to be how old?

• 4.5 billion years old

• 4.5 million years old

• 6,000 years old

• 2,000 years

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NGSS.MS-ESS1-4

Which approach is primarily used by geologists to explain the formation of Earth’s layers?

• Observing the stars

• Performing chemical reactions

• Studying rock samples

• Conducting animal behavior studies

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NOS-In the field of chemistry, how do scientists generally develop explanations for chemical reactions?

• By conducting controlled experiments

• By analyzing literature

• By collecting historical data

• By observing wildlife

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Which of the following statements correctly describes The Geologic Time Scale?

• The Geologic Time Scale is a calendar used to measure the age of rocks and fossils in hours and days.

• The Geologic Time Scale divides Earth's history into different time periods, based on significant events and changes in the Earth's surface.

• The Geologic Time Scale only includes the history of the most recent 100 years of Earth.

• The Geologic Time Scale shows the exact date when the Earth was formed.

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NGSS.MS-ESS1-4

Alfred Wegener (pronounced "VEGNER") proposed the theory of plate tectonics as a way to explain how the continents have moved from Pangaea on Earth’s surface over the course of geologic time, to how we currently know them today. Which of the following statements describes physical evidence that would support Wegener’s theory?

• papers by fellow scientists that explain how the continents have moved apart over geologic time

• maps from the 18th century that show the locations of continents and the oceans

• pictures of people who live on the same continent and look similar to one another

• fossils of the same types of plants and animals found on different continents

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Which of the following statements correctly describes the Law of Superposition?

• The oldest layers of rock are found at the top, while the youngest layers are at the bottom.

• Layers of rock do not change over time.

• The youngest layers of rock are found at the top, while the oldest layers are at the bottom.

• All layers of rock are the same age, regardless of their position.

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NGSS.MS-ESS1-4

If a scientist wants to correctly identify the relative age of a layer of sediment, which of the following

    is the best method to use?

• Measure the temperature of the sediment

• Compare the sediment layer to others above and below it

• Use radiometric dating to measure the age of the sediment

• Look for signs of erosion on the sediment surface

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NGSS.MS-ESS1-4

What type of rock do fossils form in?

• Classic

• Metamorphic

• Sedimentary

• Igneous

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Which of the following statements accurately describes a key characteristic of an index fossil?

• An index fossil is found in only one specific layer of rock around the world.

• An index fossil must be found in all rock layers in a particular region.

• An index fossil is used to help determine the relative age of rock layers and fossils.

• An index fossil can only be used to date fossils from the same species.

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