Nebular Theory

Nebular Theory

Assessment

Flashcard

Science

9th Grade

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the Nebular Theory?

Back

The Nebular Theory is a model that explains the formation of the solar system, suggesting that it formed from a rotating cloud of gas and dust (nebula) that collapsed under its own gravity.

2.

FLASHCARD QUESTION

Front

What is a protoplanet?

Back

A protoplanet is a large body of matter in orbit around the sun or another star that is in the process of forming into a planet.

3.

FLASHCARD QUESTION

Front

What are planetesimals?

Back

Planetesimals are small bodies from which a planet originated in the early stages of solar system formation.

4.

FLASHCARD QUESTION

Front

What is the significance of planets rotating counter-clockwise?

Back

Most planets rotate counter-clockwise due to the conservation of angular momentum from the original rotating nebula.

5.

FLASHCARD QUESTION

Front

What does it mean for planets to orbit the sun in the same plane?

Back

It means that the orbits of the planets are aligned along a flat disc-like structure, which is a key piece of evidence supporting the Nebular Theory.

6.

FLASHCARD QUESTION

Front

What is half-life in the context of radioactive decay?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

7.

FLASHCARD QUESTION

Front

If a sample has 6.25% of the parent isotope left, how many half-lives have passed?

Back

Four half-lives have passed.

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