Formation of stars

What is a star?

• A star is a huge ball of gas and dust that produces its own energy through nuclear reactions in its core.

• A star is a huge ball of rocks that are pulled together by gravity.

• A star is a huge ball of gas that produces its own energy through nuclear reactions in its mantle.

• A star is a huge rock that produces light through chemical reactions.

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A collection of gas and dust that can form a star is called a...

• Nebula.

• Planet

• Cluster.

• Super cluster

Gravity pulls gases and dust particles in space toward one another, squeezing them into a smaller and smaller space. The temperature at the center rises high enough for nuclear fusion of hydrogen to begin.
What stage in a stars life cycle is this describing? 

• The birth of a star
• The death of a star
• Black Hole
• Stellar Nebula

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This is an image of the formation of a star, also known as a ....

• Main Sequence

• Planetary Nebula

• Supernova

• Nebula

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______ is a force that causes dust particles to stick together in a nebula.

• nuclear fusion
• gravity
• hydrogen
• friction

How do stars form?

• through the sun
• when nebula collapses and nuclear fusion occurs
• through supernova
• Magic

Gravity pulls more dust and gas to its core, ___________ will occur and a star is formed.

• chemical reaction

• nuclear reaction

• physical reaction

• oxidation

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The balance between________ produced from nuclear fusion and ________ holds the star disc together.

• pressure - energy

• gravity - energy

• energy - gravity

• temperature - pressure

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What is the gas that makes nuclear fusion inside the star core?

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What is playing a crucial role in the formation of stars? Explain how.

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