Question

there are some words missing from the story of our suns formation. for each question select the best word from the word bank. some words will not be used.
a. gravity b. nebulae c. cool down
d. collapse e. fission f. elements
g. fusion h. heat up i. molecular clouds
the story of the suns formation
billions of years ago galaxies were filled with large clouds of dust and gas called
_______12_______. inside these clouds there were areas where the dust and
gas was thicker and more dense. these areas are called ____13______, and are
the locations where stars like our sun would begin to form.
a supernova explosion may have caused these dense parts the cloud to begin to
spin and ____14______. the material in the cloud would have continued to
condense (come together) because of ____15______. this would have
caused the material to ____16____ to 10,000,000 k which would have
caused ____17____ to begin, forming our sun.

Explanation:

• 12: "nebulae" are large clouds of dust and gas in galaxies.
• 13: "molecular clouds" are denser areas within nebulae where star formation begins.
• 14: "collapse" is the process when dense parts of the cloud start to fall inwards.
• 15: "gravity" causes the material in the cloud to condense.
• 16: "heat up" as the material condenses under gravity.
• 17: "fusion" is the process that begins in the sun when the temperature is high enough.

Answer:

1. B. nebulae
2. i. molecular clouds
3. d. collapse
4. a. gravity
5. h. heat up
6. g. fusion