ES2 Unit 5 Review

Maya and Henry are observing the night sky and discussing how stars create new elements. What process do stars use to create new elements by fusing atomic nuclei?

• radioactive decay

• electromagnetic radiation

• nuclear fission

• nucleosynthesis

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In a classroom discussion, Harper asked, "What is the final stage of a high-mass star's life cycle?"

• It cools down and becomes a neutron star immediately.

• It expands into a red giant and sheds its outer layers.

• It slowly fades into a white dwarf.

• It collapses and explodes in a supernova.

Michael is studying the life cycle of stars in his astronomy class. He learns that small-mass stars fuse helium to create which element, along with oxygen?

• Carbon

• Neon

• Lithium

• Hydrogen

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In a science class, Benjamin learned that massive stars create heavier elements like ________ and magnesium. Which element correctly fills the blank?

• Neon

• Helium

• Carbon

• Oxygen

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Abigail and Liam are discussing the process of element formation in stars. Abigail mentions small-mass stars, while Liam talks about massive stars. Which elements are produced by each type of star?

• Small-mass stars: carbon and oxygen; Massive stars: neon and magnesium

• Small-mass stars: neon and magnesium; Massive stars: carbon and oxygen

• Small-mass stars: lithium and hydrogen; Massive stars: carbon and neon

• Small-mass stars: hydrogen and neon; Massive stars: lithium and magnesium

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During a science class, Abigail and William are discussing the life cycle of stars. Abigail asks, "Which elements are primarily produced during the main sequence phase of a star's life?"

• hydrogen and helium

• carbon and oxygen

• iron, gold, and uranium

• silicon, sulfur, and magnesium

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Hannah is studying the life cycle of stars in her astronomy class. She wants to know during which stage of a star's life are carbon and oxygen primarily produced?

• main sequence phase

• red giant phase

• white dwarf phase

• supernova explosion

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During a science class, Mia and Avery were discussing the elements formed during a supernova explosion. Which elements are formed during such an event?

• hydrogen and helium

• carbon and oxygen

• iron, gold, and uranium

• silicon, sulfur, and magnesium

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Emma is studying the life cycle of stars in her astronomy class. She learns about the white dwarf phase and wonders what the primary product of this phase is in a star's life cycle. What does she find out?

• hydrogen and helium

• carbon and oxygen

• iron, gold, and uranium

• silicon, sulfur, and magnesium

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Imagine you are observing a star through a telescope. Explain why different elements are produced at different stages of the star's life cycle.

• Because each stage has different temperatures and pressures, allowing for different nuclear reactions.

• Because stars randomly produce elements at any stage.

• Because all elements are produced only during the supernova explosion.

• Because the star's mass does not affect element production.

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