Determining Ages of Rocks

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Ages of rocks quiz

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Sherif Kamal

Egypt

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Determining Ages of RocksVersion en ligne Ages of rocks quiz par Sherif Kamal 1 How do geologists describe the ages of rocks? a Physical age b Relative age and absolute age c Only relative age d Only absolute age 2 What does the law of superposition state for undisturbed horizontal sedimentary rock layers? a You cannot determine age from layers b The oldest layer is at the bottom and the youngest at the top c The oldest layer is at the top and the youngest at the bottom d All layers are the same age 3 The rock layers are (older/ younger) than any faults or intrusions that run through them. a both older and younger b the same age c older d younger 4 What is an index fossil? a A fossil that is always found with rocks of the same age b A fossil of an organism that was widely distributed and existed for a geologically short period of time c A fossil that is found only in one location d A fossil that can only be a plant 5 What is unconformity in geology? a A gap in the geologic record where rock layers have been lost due to erosion b A layer that contains no fossils c A perfect, continuous sequence of rock layers d A fault line between rock layers 6 What is the half-life of potassium-40? a 52 million years b 1.3 billion years c 713 million years d 5,730 years 7 What is the half-life of carbon-14? a 52 million years b 5,730 years c 1.3 billion years d 713 million years 8 Why can carbon-14 dating not be used for rocks older than about 50,000 years? a Because rocks do not contain carbon b Because carbon-14 dating requires volcanic rocks c Because carbon-14 decays too quickly d Because the amount of carbon-14 left would be too small to measure accurately

Determining Ages of RocksVersion en ligne

Ages of rocks quiz

par Sherif Kamal

How do geologists describe the ages of rocks?

Physical age

Relative age and absolute age

Only relative age

Only absolute age

What does the law of superposition state for undisturbed horizontal sedimentary rock layers?

You cannot determine age from layers

The oldest layer is at the bottom and the youngest at the top

The oldest layer is at the top and the youngest at the bottom

All layers are the same age

The rock layers are (older/ younger) than any faults or intrusions that run through them.

both older and younger

the same age

older

younger

What is an index fossil?

A fossil that is always found with rocks of the same age

A fossil of an organism that was widely distributed and existed for a geologically short period of time

A fossil that is found only in one location

A fossil that can only be a plant

What is unconformity in geology?

A gap in the geologic record where rock layers have been lost due to erosion

A layer that contains no fossils

A perfect, continuous sequence of rock layers

A fault line between rock layers

What is the half-life of potassium-40?

52 million years

1.3 billion years

713 million years

5,730 years

What is the half-life of carbon-14?

52 million years

5,730 years

1.3 billion years

713 million years

Why can carbon-14 dating not be used for rocks older than about 50,000 years?

Because rocks do not contain carbon

Because carbon-14 dating requires volcanic rocks

Because carbon-14 decays too quickly

Because the amount of carbon-14 left would be too small to measure accurately

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Determining Ages of Rocks

Test

À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Determining Ages of RocksVersion en ligne

par Sherif Kamal

How do geologists describe the ages of rocks?

What does the law of superposition state for undisturbed horizontal sedimentary rock layers?

The rock layers are (older/ younger) than any faults or intrusions that run through them.

What is an index fossil?

What is unconformity in geology?

What is the half-life of potassium-40?

What is the half-life of carbon-14?

Why can carbon-14 dating not be used for rocks older than about 50,000 years?