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Questions and Answers
What is an element?
What is an element?
- A pure substance made of atoms that are all of the same type (correct)
- A mixture of compounds with varying properties
- A combination of different types of atoms
- An unstable substance with changing atomic composition
Where were the other 86 elements found in nature created?
Where were the other 86 elements found in nature created?
- In nuclear reactions in stars and supernovae (correct)
- In the Earth's core
- In the cosmic dust and gases from the Big Bang
- During the formation of the universe
What accounts for 85% of the Sun's energy?
What accounts for 85% of the Sun's energy?
- Reactions producing beryllium and lithium
- Reactions fusing elemental hydrogen into helium (correct)
- The energy stream warming the planet
- Ultraviolet light and X-rays
What makes up the solar wind?
What makes up the solar wind?
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What is the primary function of the Earth's atmosphere?
What is the primary function of the Earth's atmosphere?
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What happens when a star's core runs out of hydrogen?
What happens when a star's core runs out of hydrogen?
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During a supernova explosion, which elements are expelled out into space?
During a supernova explosion, which elements are expelled out into space?
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What is the purpose of the Element rap activity mentioned in the text?
What is the purpose of the Element rap activity mentioned in the text?
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What does the text suggest about scientists' approach to new evidence?
What does the text suggest about scientists' approach to new evidence?
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What is the significance of helium gas created in the early universe?
What is the significance of helium gas created in the early universe?
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