Copy of Relative Dating

Multiple Choice

Why is relative dating important in the study of fossils and geological events?

• It helps determine the exact age of fossils.

• It allows comparison of fossils in different rock layers to understand their sequence.

• It is used to identify the chemical composition of rocks.

• It provides information about the climate when fossils were formed.

Multiple Choice

How do we find the relative age of rock layers?

• By using the Law of Superposition and Index Fossils

• By measuring the temperature of rocks

• By looking at the color of rocks

• By checking the hardness of rocks

Open Ended

Explain the Law of Superposition and how it helps scientists determine the relative ages of sedimentary rock layers.

Multiple Choice

Which of the following statements about sedimentary rocks is correct?

• They are deposited horizontally and make up about 75% of Earth's surface.

• They are always formed by volcanic activity.

• They are the least common type of rock on Earth's surface.

• They cannot be disturbed by faults.

Multiple Select

Select all the processes that can disturb rock layers.

• Extrusions/Intrusions

• Faults

• Folding

• Sedimentation

Fill in the Blank

Extrusion is when magma cools on the surface of the Earth and forms a ___ layer than the rock below.

Open Ended

Describe how an extrusion forms and what evidence you might look for in the field to identify one.

Fill in the Blank

Igneous ___ forms when magma cools and solidifies within existing rock layers.

Open Ended

Describe how new rock layers are formed on top of an extrusion and how this affects the relative ages of the layers.

Multiple Choice

Which of the following best describes the difference between an intrusion and an extrusion in rock layers?

• An intrusion forms when magma is forced into older rock layers and cools, while an extrusion forms when lava flows onto the surface and hardens.

• An intrusion forms on the surface, while an extrusion forms below the surface.

• Both intrusion and extrusion form on the surface.

• Intrusion and extrusion are the same process.

Multiple Choice

What is the main process that causes rock layers to move over time?

• Weathering

• Fault movement

• Erosion

• Deposition

Multiple Choice

Which of the following statements about faults is correct?

• Faults are older than the rock they cut through.

• Faults never move after they are formed.

• Faults are younger than the rock they cut through.

• Faults do not affect rock layers.

Open Ended

Explain how faults can affect the determination of the age of rock layers.

Multiple Choice

Why does the presence of faults make it difficult to determine the age of rock layers?

• Because faults mix up the rock layers, making their sequence unclear.

• Because faults remove rock layers completely.

• Because faults add new rock layers from other locations.

• Because faults make the rock layers thinner.

Open Ended

Explain the challenges geologists face when labeling rock layers that have been affected by faults.

Multiple Choice

Which of the following statements about folding and tilting of rock layers is correct?

• Folding and tilting events are always older than the layers they affect.

• Folding occurs due to Earth's external forces.

• Tilting occurs when rock layers bend and buckle.

• Folding and tilting events are always younger than the layers they affect.

Fill in the Blank

Unconformity is when new rock layers meet a much ___ rock surface beneath.

Fill in the Blank

Relative dating is used to determine the age of a fossil or event in comparison to fossils in other layers of ___.

Open Ended

How would you explain the concept of relative dating to someone unfamiliar with geology?