The Earth grew by countless impacts from rock and dust in the early Solar System. This rock and dust contained ice which turned to vapor (steam) when it struck the Earth. This vapor was forced to the surface in much the same way that sediment settles in a glass of muddy water. Over time the crust of the Earth cooled and eventually the vapor condensed into the liquid water that we drink.
A year is based on the time it takes Earth to do one revolution or orbit of the sun.
Astronomers observe as much as they can and collect enormous amounts of information based upon the radiation in various spectra, both visible and invisible, from stars, galaxies, interstellar gas clouds, and anything else they can see in the night sky, and they then perform very intricate and sophisticated mathematical analyses of the data in order to obtain reasonable theories.
An idea based on many detailed observations is an empirical theory. This type of theory is grounded in data gathered from systematic and careful observations of the natural world. The strength of an empirical theory lies in its ability to make predictions and be tested through further experimentation.
The dew point temperature is the temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid. Formation of dew occurs when the air temperature drops to the dew point, leading to condensation on surfaces. This temperature varies based on humidity levels; higher humidity results in a higher dew point. To determine the specific dew point temperature at which formation began in a given context, the current temperature and relative humidity must be measured.
The protoplanet hypothesis originated from the need to explain the formation of planets in a systematic way, based on observations of protoplanetary disks around young stars. It suggests that dust and gas in these disks coalesce through processes like accretion and gravitational attraction, leading to the formation of larger bodies, or protoplanets. This hypothesis is supported by the laws of physics, including gravity and conservation of angular momentum, and aligns with the observed structure of our solar system and others. Ultimately, it provides a coherent framework for understanding the transition from dust clouds to planetary systems.
As it should be.
Like the best portfolio theory for today's market is based on the Dynamic Market Environment theory.
Normative Theory is a theory that prescribes how a process of accounting should be done. This theory is not based on observation and may suggest radical changes to current practices in accounting
Stimulus-response bond theory proposes that learning occurs through the formation of associations between a stimulus and a response. This theory suggests that repeated pairings of a stimulus with a specific response result in the formation of a strong bond between the two, leading to the learned behavior. It is based on the principles of classical and operant conditioning.
Impression formation theory suggests that people form judgments about others based on limited information, such as physical appearance, behavior, and stereotypes. This theory highlights how people categorize and interpret information to create a coherent impression of others. It emphasizes the importance of first impressions in shaping subsequent interactions and perceptions.
It is the current working theory of the origin of the universe. It is the paradigm that Astronomy is based upon. But, new evidence is always being described. The theory itself might change as our knowledge grows.
A guess that, based on the current evidence, makes the most sense.
the answer changes depending on witch lunar formation you believe, for egsample, f you believe in the simultaneous formation theory or capture theory the moon has been orbiting the earth from the moment it has been created, but if you beleve in the impact thery the mon has only been orbiting the earth for about half of the earths current life
New evidence that contradicts current predictions, advancements in technology that allow for better testing of the theory, or a shift in the scientific consensus based on improved understanding of a phenomenon can all contribute to a theory changing.
A theory is based on a hypothesis. A hypothesis is an estimated or intelligent guess about the outcome of an experiment. A theory is based on what happens during the experiment.
Wikipedia has a good discussion on the many divergent areas that contributed to the theory of plate tectonics. Visit http://en.wikipedia.org/wiki/Tectonic_plate.
Based on temperature differences.