Sci-Five | The Hindu Science Quiz: on Comets

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Sci-Five | The Hindu Science Quiz: on Comets

Comet ISON is shown in this NASA handout provided April 23, 2013. File

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1 / 5 | According to NASA, how many comets have been identified so far?

• More than 3,700
• Over 1,000
•  More than 2,000
• Fewer than 500

The current number of known comets is: 3,743. https://solarsystem.nasa.gov/asteroids-comets-and-meteors/overview/

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2 / 5 | The tiny frozen part of a comet is called...

• The eye
• The nucleus
• The core
• The chamber

The nucleus contains icy chunks, frozen gases with bits of embedded dust. https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/in-depth/

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3 / 5 | A comet warms up as it nears the Sun and develops an atmosphere called...

• The khaos
• The ica
• The coma
• The aola

 The coma may extend hundreds of thousands of kilometers. https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/in-depth/

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4 / 5 | Which of the following statements is true?

• Comets don’t have tails
• A comet’s tail is defined by distance
• A comet has a single tail
• A comet has two tails

Comets actually have two tails―a dust tail and an ion (gas) tail. https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/in-depth/

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5 / 5 | What are sungrazers?

• Type of comets that crash straight into the Sun
• Type of comets that maintain a safe distance from the Sun
• Type of comets that come between a planet and its star
• Type of comets that move between star systems

Some comets, called sungrazers, crash straight into the Sun or get so close that they break up and evaporate. https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/in-depth/

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