The heat that remains inside the Earth from its creation and radioactive decay are its main heat sources.
The deep earth receives heat from three main sources: (1) heat left over from the planet's formation and accretion, (2) frictional heating brought on by denser core material sinking to the planet's centre, and (3) heat from radioactive element decay.
The energy produced when unstable atoms decay is known as radioactivity, and it is a substantial contributor to the Earth's heat. The main source are the radioactive isotopes of uranium-235 (235U), uranium-238 (238U), potassium-40 (40K), and thorium-232 (232Th) in the Earth's mantle.
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Answer:
1. Alexander Oparin's and J. B. S. Haldane's
2. Methane (CH4)
3. Simulate
4. Sparkling device
5. Lightning storm
6. brown broth rich in amino acids
7. Reducing
8. spontaneous organic compound
9. Amino acids.
Explanation:
Miller and Urey performed experiments to support the "Alexander Oparin's and J. B. S. Haldane's" hypothesis. In their experiment, they combined "Methane (CH4)," ammonia, hydrogen gas, and water in a closed system and "Simulate" it to mimic conditions on early Earth. After stimulating the system with a "Sparkling device" to mimic "Lightning Storm, " they discovered that "brown broth rich in amino acids" was produced. This suggests that early Earth had a "Reducing" atmosphere, leading to redox reactions that catalyzed the "spontaneous organic compound" synthesis of organic monomers such as "Amino acids."
Answer:
Madagascar
Explanation:
The largest number of islands of Africa are found in the Indian Ocean, with the sovereign island nations of Comoros, Seychelles, Mauritius and Madagascar located off the southeastern seaboard of Africa being the most notable.
High- pressure/low-temperature (HPLT) metamorphism is believed almost exclusively to occur at such cool conditions inside the convergent plate margins
<u>Answer:</u>
The geography of the Americas and Oceania contributed to their unique development by providing them with the most favorable climatic conditions and abundance of valuable natural resources.
<u>Explanation:</u>
- The geography of the Americas and Oceania has been blessed with possibly the most diverse features than any other continents in the world.
- The Americas are surrounded by oceans on all the sides and so is Oceania.
- The availability of valuable natural resources in the Americas and Oceania has allowed the regions to prosper at a great pace.
- Land-forms favorable for various occupations, the existence of perennial water resources and various other factors like these have contributed to the unique development of the continents.
