Planeta

Planeta

Assessment

Interactive Video

Science, Physics

4th - 9th Grade

Hard

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The National Astronomy Institute has set criteria for a celestial body to be classified as a planet, which includes having sufficient gravitational mass to maintain a rounded shape and clearing its orbit of other objects. Due to these criteria, Pluto is no longer considered a planet, reducing the number of planets in our solar system to eight.

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2 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the significance of a planet having sufficient gravitational mass?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

What does it mean for a planet to keep its orbit free of other objects?

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