(A nebula)
is a cloud of gas (hydrogen) and dust in space. Nebulae are the birthplace biths. There are different types of nebula. An Emission Nebubla such as Orion nebula, glows brightly because the gas in it is energised by the stars that have already formed within it.
(A star)
is a luminous globe of gas producing its own heat and light by nuclear reactions (nuclear fusion). They are born from nebulae and consist mostly of hydrogen and helium gas.
(red giant)
This is a large bright star with a cool surface. It is formed during the later stages of the evolution of a star like the Sun, as it runs
out of hydrogen fuel at its centre.
(red dwarf)
These are very cool, faint and small stars, approximately one tenth the mass and diameter of the Sun. They burn very slowly and have estimated lifetimes of 100 billion years.
(white dwarf)
This is very small, hot star, the last stage in the life cycle of a star like the Sun. White dwarfs have a mass similar to that of the Sun, but only 1% of the Sun's diameter; approximately the diameter of the Earth.
(Black holes)
are believed to form from massive stars at the end of their life times. The gravitational pull in a black hole is so great that nothing can escape from it, not even light. The density of matter in a black hole cannot be measured.
Answer:
Food webs are made up of food chains.
Explanation:
The part of the ATP cycle in which analogous on spending money is ATP is broken down by water to ADP, energy and P. ATP or adenosine triphosphate is defined as a nucleotide that performs many essential roles in the cells and it is also an energy source that is used in living things.
Answer:
<u><em>1.) The adaptation of the Pulmonata to terrestrial life has entailed little modification of the internal organization.</em></u>
<u><em>2.) The short feet of the penguins are an adaptation.</em></u>
<u><em>3.) Progress is the result of adaptation, rather than reconstruction.</em></u>
<u><em>4.) It is an adaptation of hide-the-thimble.</em></u>
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