Answer:
a
Explanation:
Fossil fuels are considered non renewable because they take millions of years to form but depleted faster than they are formed.
Fractional distillation is the process in which the alkanes in petroleum can be partly separated. This is due to the petroleum having different boiling points. The process starts off with the heating of crude oil for it to vaporize. The vaporized crude oil is then fed into the bottom of the distillation tower. The resulting vapor rises through a vertical column. As the gases rises through the distillation tower, its temperature decreases. Thus, certain hydrocarbons begin to condense and run off at varying levels. Each level-specific condensed fraction contains hydrocarbon molecules that has a similar number of carbon atoms. These "cuts" of boiling point allow numerous hydrocarbons to be separated out in a single process. The cooling of the tower height allows for the separation. Subsequent to the refinement, individual fuels may undergo more refinement to remove existing contaminants or substances so as to improve the quality of the fuel through cracking.
I would say the answer is C
Galaxy
- It is a collection of billions of stars.
- Resembling human beings or animals.
- There are billions of galaxies in the Universe.
- There are not many galaxies, which are visible to the naked eyes.
Constellation
- It is a collection of only a few stars.
- Stars in the constellation are arranged in patterns resembling human beings or some animals.
- There are only about 88 constellations.
- There are many constellations, which can be observed with the help of naked eyes.
Answer:
dude.....
Explanation:
wherez the entire question
The correct answer is this: IT BECOMES LESS DENSE AND RISES TO THE SURFACE.
The water at the earth's poles are cold and dense. This cold water sink and move along the ocean floor in a current. As it moves towards the equator, the cold water from the poles push up the warmer water, this becomes less dense and rise to the surface.
