The video tutorial introduces the concept of relative age dating in geology, focusing on determining the sequence of events in rock layers. It covers key principles such as superposition, original horizontality, and cross-cutting relations, explaining how these concepts help in understanding the relative ages of rocks. The tutorial also discusses contact metamorphism and its role in identifying the sequence of geological events.

What is the main idea behind relative age dating?

• Measuring the temperature at which rocks were formed

• Finding the chemical composition of rocks

• Comparing the age of one rock layer to another

• Determining the exact age of rocks in years

According to the Principle of Superposition, which rock layer is the oldest?

• The layer with the most fossils

• The layer at the bottom

• The layer in the middle

• The layer at the top

Tags

NGSS.MS-ESS1-4

What does the Principle of Original Horizontality state?

• Rock layers are deposited in random orientations

• Rock layers are always folded

• Rock layers are originally deposited horizontally

• Rock layers are always vertical

Why are some rock layers bent and folded?

• Because of tectonic forces

• Due to volcanic activity

• Due to the weight of overlying layers

• Because of erosion

Tags

NGSS.MS-ESS2-2

What is an intrusion in geological terms?

• Magma pushing through rock layers

• A layer of rock formed by erosion

• A type of sedimentary rock

• A fault line in the rock

What principle helps us understand that faults and intrusions are younger than the rocks they affect?

• Principle of Uniformitarianism

• Principle of Cross-Cutting Relations

• Principle of Original Horizontality

• Principle of Superposition

What happens to rock layers when magma intrudes into them?

• They experience contact metamorphism

• They get eroded

• They remain unchanged

• They become sedimentary rocks

Tags

NGSS.MS-ESS2-2

Why is contact metamorphism useful in relative age dating?

• It shows which rock layers were present during the intrusion

• It measures the temperature of rock formation

• It indicates the chemical composition of rocks

• It helps determine the exact age of rocks

Tags

NGSS.MS-ESS1-4

In the left-hand diagram, why wasn't limestone layer D metamorphosed?

• It was eroded before the intrusion

• It was already metamorphosed

• It was deposited after the intrusion

• It was too far from the magma

What is the correct order of events in the given geological diagram?

• Sandstone, Shale, Limestone, Intrusion, Fault, Salt

• Shale, Limestone, Sandstone, Fault, Intrusion, Salt

• Salt, Fault, Intrusion, Limestone, Sandstone, Shale

• Shale, Sandstone, Limestone, Intrusion, Fault, Salt

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2