Hey there Lorin!
Long period comets come something called the OORT CLOUD.
Short period comets come from the kuiper belt.
-Steel jelly
It was made of a skeleton of iron and a skin off glass. Hope this helps.
Physical and chemical changes may be similar because neither can change the number of atoms of each element that are present.
<h3>What do you mean by Physical changes?</h3>
Physical changes may be defined as those changes which appeared physically like color, odor, texture, mass, and density.
Chemical changes may lead to the formation of new chemicals with definite properties. It involves when the chemical identity of any substance may alter.
Therefore, physical and chemical changes may be similar because neither can change the number of atoms of each element that are present.
To learn more about Chemical changes, refer to the link:
brainly.com/question/17384175
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A biotic factor is all of the students in the classroom.
Hope this helps!!
