You need to make a "rubbing" of the indentations left in the paper behind the paper your wife was writing on. To do this, simply grab another piece of paper (thin) and place it on top of the paper, then with a #2 (or charcoal, if you have one) pencil, rub gently until the pattern of letters/words appears. This is the same thing people do on tombstones of loved ones.
The three types of imprint evidence are footwear impressions, tire impressions, and tool marks. Footwear impressions are left behind by shoes, tire impressions by vehicle tires, and tool marks by tools or objects in contact with a surface. They are useful in forensic investigations to identify the source of the imprint.
chad/chads.
The cavity left behind in the rock after an organism's hard part has dissolved is called a mold. Mold fossils are negative impressions of the organism that once occupied that space.
Ash content in filter paper refers to the residue left behind after burning the filter paper. It is a measure of the inorganic materials present in the filter paper, such as minerals or impurities. Ash content can affect the performance of the filter paper in certain applications.
The residue is left behind on the filter paper because the filter paper acts as a barrier that traps solid particles while allowing liquids to pass through. As the liquid passes through the filter paper, solid particles that are too large to pass through get trapped, resulting in the residue accumulating on the filter paper.
They are not the same. If you pass a suspension through a filter paper, all the solid that was in suspension is left behind on the paper. A solution doesn't have any solid bits in suspension - it is all liquid. It will go through a filter paper without leaving any thing behind.
Fossils
to stay behind or to be left
There is no universal rule for taking thumb impressions based on gender. In some cultures or settings, left thumb impressions may be taken for men and right thumb impressions for women as a tradition or custom, but this is not a standard practice everywhere.
Archaeology
The past tense of "leave behind" is "left behind."
Fossils