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miss Akunina [59]
3 years ago
10

About how long ago did our solar system start to form?

Biology
1 answer:
Darya [45]3 years ago
6 0

Answer:

about 5 billion years ago

Explanation:

Our solar system formed about 5 billion years a go from a dense cloud of interstellar gas and dust.

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PLEASE HELP!! Gas cloud 1 is likely to form a star. Gas cloud 2 is not. Based on this information, match the given conditions wi
Alex

Answer:

Gas cloud 1:   It spreads with a greater volume and less concentration of elements.  Its temperature stays well below the 14 million Kelvin.  It has hydrogen atoms that retain there electrons.

Gas cloud 2: Its volume shrinks and the density increase die to the gravity . Its temperature stays above the 14 million kelvin . Hydrogen atoms shed there electron.

Explanation:

As you already know, stars form within clouds of gas. These clouds have interstellar gases composed mainly of dust and hydrogen. When subjected to low temperatures, gases react and combine to form molecules that create clouds and continue to react until they form stars.

Cloud 1 has characteristics that show that it will form a star which are: It spreads with a greater volume and less concentration of elements, its temperature stays well below the 14 million Kelvin, it has hydrogen atoms that retain there electrons.

as we know that cloud 2 will not form stars we can say that its characteristics are:  Its volume shrinks and the density increase die to the gravity , its temperature stays above the 14 million kelvin , hydrogen atoms shed there electron.

7 0
3 years ago
Regions of similar ecosystems are called
daser333 [38]
Biome

a complex biotic community characterized by distinctive plant and animal species and maintained under climatic conditions of the region, especially such as a community that has developed to climax.
5 0
3 years ago
Which characterization accurately describes BOTH regular fossils and index fossils?
kompoz [17]

Answer:

D

Explanation:

Fossils tell us where they came from.

Have a great day

7 0
3 years ago
The zone of aeration _______________________. (Choose 2)
dlinn [17]
Soil and rocks maybe. not too sure.
3 0
4 years ago
______________ is a contractile tissue that can accurately change the lumen size of an arteriole so that the conductance of flow
umka21 [38]

Answer: Vascular smooth muscle cells.

Explanation:

Vascular smooth muscle cells are the contractile tissues which regulates flow blood and pressure of the blood by vasoconstriction (contraction) and/or vasodilatation (relaxation).

Vasoconstriction is the contraction of the blood vessels to increase tge pressure of the blood.

Vasodilatation is the relaxation of the blood vessels which results in a decrease in blood pressure.

5 0
3 years ago
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