Stars and Nebulae Quiz

What is a Nebula?

• A type of star that is cooling and expanding.

• A cloud of gas and dust where stars are born.

• The final stage of a star's life cycle.

What happens during the Protostar stage of a star's life cycle?

• Gravity pulls gases and dust together and nuclear fusion starts.

• The star becomes a red giant.

What is Fusion in the context of a star's life cycle?

• The star turning into a red giant.

• Joining hydrogen atoms to make helium.

• The collapse of a star into a black hole.

What characterizes a Main Sequence Star?

• It is the stage where hydrogen is fusing into helium, the longest stage in a star's life.

• It is the stage where a star explodes into a supernova.

What happens when a star becomes a Red Giant?

• It starts to cool and expand, with helium fusing into carbon.

• It collapses into a black hole.

• It begins the nuclear fusion process.

• It forms from a cloud of gas and dust.

What is a White Dwarf?

• A white dwarf that has burnt out completely and does not give off any light.

• A glowing ball of gas about the size of Earth, where nuclear fusion has stopped and the gas begins to cool.

• A nebula that is forming into a protostar.

What is a Black Dwarf?

• A glowing ball of gas about the size of Earth, where nuclear fusion has stopped and the gas begins to cool.

• A nebula that is forming into a protostar.

• A white dwarf that has burnt out completely and does not give off any light.

What is a Black Hole?

• A glowing ball of gas about the size of Earth, where nuclear fusion has stopped and the gas begins to cool.

• A nebula that is forming into a protostar.

• The result of the highest mass stars exerting a gravitational pull that no light can escape.

Which sequence correctly describes the life cycle of an average sized star?

• Nebula, protostar, main sequence star, red giant, white dwarf

• Red giant, main sequence star, nebula, white dwarf, black dwarf

What is a star primarily composed of?

• Rock and ice

• Hydrogen and helium

• Iron and silicon