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IV. YOUR TERMINAL KEY POINTS!
1. 73% of the mass of the universe is in hydrogen, Helium makes up about 25% and everything else represents only 2%
2. Approximately 14 billion years ago the universe began as an extremely hot and dense energy.
3. The radiation that fills the universe is famously known as "Cosmic Background radiation".
4. Transmutation is the changing of one element into another that occurs when a radioactive nucleus emits an alpha or beta particle.
5. Carbon-14 is used to date wooden artifacts and the remains of plants and animals.
6. Radioactive minerals, such as uranium-238 or uranium-235, are used to date older, nonliving materials
Answers & Comments
Explanation;
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In conclusion, the universe is composed mostly of hydrogen and helium, was born billions of years ago from a hot, dense energy, and is filled with cosmic background radiation. Transmutation is the changing of one element into another, and carbon-14 is used to date organic remains, while radioactive minerals are used to date inorganic material.