Answer:
The periodic table of elements arranges all of the known chemical elements using this method. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order is usually according with the increasment (Is this a word?) of the atomic mass.
Explanation:
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The remains of a Hadrosaur are an example of a fossil typically structures like bones shells and teeth fossilized more often then things like tissues or plant leaves.
The clivage furrow forms, the chromosomes are on either side of the cell
the difference in altitude represented by the space between two contour lines on a map. At least i think youre looking for the definition. And if you are hope this helps :)
Ecosystem and pond,
not sure though but good luck !