LLT412 – Quiz Portal

LLT412

Welcome to LLT412!

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"You need to overcome the tug of people against you as you reach for high goals.",
George S. Patton - @harauenglish

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Let's play the talk!

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1. What is the main topic of this lecture?

Popcorn.

Geological formations.

Radiometric dating.

Carbon-14.

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2. What is the definition of a half-life?

The average time it takes for half of a group to decay.

Half the time it takes for a group to decay.

Half of the carbon present in a living organism.

Half an hour for an individual nucleus to decay.

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3. Why does the professor mention popcorn?

Because popcorn is a carbon-based life form.

Because he is using popcorn in a laboratory demonstration.

Because it was an example in the textbook.

Because popcorn is a good analogy for half-lives.

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4. What do we know about carbon-14?

It represents most of the carbon in living things.

It is the only accurate isotope for radiometric dating.

It is used to estimate the age of carbon-based life forms.

It has a half-life of almost 50 billion years.

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5. Listen again to part of the lecture. Then answer the question.

"So what about rocks that are millions or even billions of years old? Well, the same process can be applied, but we have to use istopes that have longer half-lives."

Why does the profes or ask this question: "So what about rocks that are millions or even billions of years old?"

He is preparing to suggest an answer to the question that he has just asked.

He is probing to see whether the students have understood the lecture so far.

He is expressing doubt about the concept that he has been discussing.

He is trying to encourage the students to answer a difficult question.

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6. Which of the following would NOT be dated using carbon-14?

A giant crystal.

A dead tree.

An animal skull.

A fossilized shellfish.

Let's see the result. Learning together, supporting each other!