Mercury, Venus, Earth, and Mars are considered terrestrial planets because those planets are mainly composed of metal or rock and are closest to the sun.
Answer:
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Explanation:
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There are several different types of spectrums that you could expect to find from
the gas cloud, but the best option from the list would be "<span>high-frequency spectrum".</span>
In an open system such as a campfire, matter can lose particles, gain particles or exchange particles.
<span> In </span>space<span>, where there is no air, sound has no way to travel.</span>
