
Universo e stelle
Authored by Guido Gerosa
Science
8th Grade
Used 13+ times

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27 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cosa sono le stelle?
Corpi celesti freddi
Sfere gassose ad altissima temperatura
Sfere di combustibile solido ad altissima temperatura
Sfere di ossigeno ad altissima temperatura
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual è la composizione principale delle stelle?
Idrogeno ed elio
Ossigeno e azoto
Carbonio e ferro
Silicio e magnesio
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Come si forma una stella?
Da un'esplosione di una supernova
Da un accumulo di gas e polvere nello spazio
Da un pianeta che implode
Da un buco nero che si espande
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quali sono, generalmente, la massima e la minima temperatura superficiale di una stella?
500° - 10000°
3000° - 30000°
6000° - 60000°
10000° - 100000°
Non esiste limite
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Come si chiama il fenomeno che porta alla morte di una stella massiccia?
Esplosione di una supernova
Formazione di una nebulosa
Fusione nucleare
Emissione di radiazione
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual è il ciclo di vita di una stella di piccola massa (più piccola del Sole)?
Nebulosa-Protostella-Stella in sequenza principale - Gigante rossa - Nana bianca
Nebulosa-Stella in sequenza principale - Gigante rossa - Protostella -Nana bianca
Nebulosa-Protostella-Stella in sequenza principale-Gigante rossa-Nova-Nana Bianca
Nebulosa-Stella in sequenza principale-Gigante rossa-Nova-Stella a neutroni-Nana Bianca
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual è il processo che alimenta le stelle durante la loro fase di vita nella sequenza principale?
Fusione nucleare dell'idrogeno in elio
Fissione nucleare dell'elio in idrogeno
Combustione di materiali solidi
Reazione chimica tra gas e polvere
Fusione nucleare dell'elio in carbonio
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