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The kind of gas cloud that is most likely to give birth to stars is a cold, dense gas cloud.
Stars are formed in giant molecular clouds, called "star nurseries". These are regions with molecular Hydrogen, Helium, and little amounts of other elements. These are cold and dense regions, and the gas cloud collapses, forming a protostar. The protostar gradually heats, powering nuclear reactions in its center, which increases the temperature even more and giving birth to a star.
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Gravity causes the motions of planets, stars, and galaxies. It's why the Moon orbits around the Earth, and the Earth orbits around the Sun, and the solar system orbits around the galaxy.
Answer:
D
Explanation:
The answer is D. Solutions you cannot see the separate substances. however in a mixture you can see the different substances. So the correct choice is D
1. is D. Scientific method cannot be replaced.
2. is B.
3. is B as well.
Answer:
An object is in motion if it changes position relative to a reference point.
Explanation:
