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Questions and Answers
According to scientific theories, how was the Earth created?
According to scientific theories, how was the Earth created?
- By the collision of two planets
- By a supernatural being
- Through a process called the Big Bang
- Through the gradual accumulation of dust and gas (correct)
What is the estimated age of the Earth?
What is the estimated age of the Earth?
- 1 million years
- 1000 years
- 10 billion years
- 4.5 billion years (correct)
What is the Earth's core made of?
What is the Earth's core made of?
- Liquid water
- Solid gold
- Molten lava
- Solid iron (correct)
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Study Notes
The Origin of the Earth
- Scientific theories suggest that the Earth was created around 4.5 billion years ago through the process of planetary accretion, where gravity pulled together dust and gas in the solar nebula.
Age of the Earth
- The estimated age of the Earth is approximately 4.5 billion years, based on radiometric dating and geological evidence.
The Earth's Core
- The Earth's core is made up of two layers: a solid inner core and a liquid outer core, composed primarily of iron (~85%) and nickel (~10%), with small amounts of lighter elements such as sulfur and oxygen.
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