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1. The Big Dipper is an asterism in the constellation Ursa Major (the Great Bear).One of the most familiar star shapes in the northern sky, it is a useful navigation tool. ... Asterisms are prominent groups of stars that form patterns but are smaller than, or even part of, a constellation. They are usually easy to find because the stars are close to one another and about the same brightness.
3. Soil contamination or soil pollution as part of land degradation is caused by the presence of xenobiotics (human-made) chemicals or other alteration in the natural soil environment. It is typically caused by industrial activity, agricultural chemicals or improper disposal of waste.
2. SOLID:The Molecular Arrangement in Solids. The molecular arrangement in a solid is one where the molecules (or atoms, or ions) are held in a tightly packed, highly organized pattern, as in the below figure. ... There are only tiny spaces between the molecules, not nearly enough space for the particles to move past one another.
Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern
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