Name an element that can be used to date back billions of years?
Using radiometric

This graph gives information on changes in sea ice extent in the arctic ocean over a 30-year span. the overall trend shows in the ice extent. to address the trend, scientists need to ask themselves, one direct consequence of the trend is that

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Liv sheldon given the balanced equation for an organic reaction: c2h2 + 2cl2 → c2h2cl4 this reaction is best classified as *