3) Why did the solar nebula heat up as it collapsed? A) Nuclear fusion occurring in the core of the protosun produced energy that heated the nebula. As the cloud shrank, its gravitational potential energy was converted to kinetic energy and then into thermal energy.
In astronomy or planetary science, the frost line, also known as the snow line or ice line, is the particular distance in the solar nebula from the central protostar where it is cold enough for volatile compounds such as water, ammonia, methane, carbon dioxide, and carbon monoxide to condense into solid ice grains.
What is the primary basis upon which we divide the ingredients of the solar nebula into four categories (hydrogen/helium; hydrogen compound; rock; metal)? - The atomic mass numbers of various materials. - The amounts of energy required to ionize various materials.
The best estimate for Earth's age is based on radiometric dating of fragments from the Canyon Diablo iron meteorite. From the fragments, scientists calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years.
Sunspots appear dark (in visible light) because they are much cooler than the rest of the surface of the Sun. However, even though they appear dark, they are still very hot. If a sunspot was alone in space, it would glow brightly.
When it comes to the formation of our Solar System, the most widely accepted view is known as the Nebular Hypothesis. In essence, this theory states that the Sun, the planets, and all other objects in the Solar System formed from nebulous material billions of years ago.
Biblical Adam (man, mankind) is created from adamah (earth), and Genesis 1–8 makes considerable play of the bond between them, for Adam is estranged from the earth through his disobedience.
The first branch is mathematics & logic. Mathematics and logic deals with abstract concepts. It goes hand in hand as both are needed in relation to finding out how social sciences and natural sciences work. They are also both needed in forming laws, theories and hypothesis.
Generally speaking, scientists have developed
four different methods of determining the
age of the
earth.
How Do Scientists Measure Earth Age?
- Radiation Measurement.
- Stratigraphic Superposition.
- The Fossil Record.
In 300 million years or less, it may become very inhospitable for life to continue to exist on the land, and if we leave it alone, evolution may encourage life to return to the sea where the climate will be a bit more moderate. As for humans, we may adapt to living on the land, or we may decide to leave the planet.
