Answer:
A suburb is a residential district located on the outskirts of a city. If you live in the suburbs, you probably travel to the city for work. Suburb comes from Latin: sub means "below or near" and urbis means "city." You also will recognize this root in urban.
Explanation:
Answer:
Mountains or other topography
Explanation:
This makes sure the air rises and cools in temperature, but because they cant hold that much of the water they form into clouds.
Answer:
<h2><u><em>natural resources are sources that occur in nature</em></u></h2>
there are two types of natural resources :
a) renewable resources
b) non-renewable resources
sunlight , trees, water, buildings and ships are <u>natural resources</u>
adobe is<u> not a natural resource</u>
<h3><u>
further explanation </u></h3>
buildings are made of clay from the earth which is a natural resource
ships are made of metal ores which are found in the earth hence also a natural resource
Answer: is constant
Explanation:
In order to analyze the velocity of the stars within a galaxy, the <u>galaxy rotation curves</u> (developed by the American astronomer Vera Rubin) are used. These graphs are elaborated as a scatter diagram in which the orbital velocity of the stars present in a galaxy is represented on the Y axis and the distance of these stars to the center of the galaxy on the X axis.
Thanks to this diagram, it has been possible to observe a characteristic behavior in the rotation speed of the stars (and gas) present in the galaxies, which differs from the rules of the orbital movement of the planetary systems postulated by Newton and Kepler.
This means that in these galaxy rotation curves it has been observed that the rotation speed of stars and gas is "constant", regardless of the distance to the center of the galaxy. This discrepancy and these results were then used to demonstrate the existence of dark matter in the universe.