Final answer:
Folding a marked sheet of paper and placing it on an unmarked sheet will cause no change to the dot; it will remain visible as this is a physical action without a chemical reaction. Other experiments mentioned demonstrate physics principles like air pressure, gravity, light, and Bernoulli's principle.
Step-by-step explanation:
The question you've posed is related to the concept of physical changes affecting materials, specifically in the domain of Physics. When you fold the marked sheet of paper in half and place it on top of the unmarked sheet, the dot on the marked sheet will remain visible. Neither the act of folding the paper nor placing it on another sheet will cause the ink to transfer, disappear, or change color. This is a physical action that does not lead to a chemical reaction or any other process that can change the visibility or properties of the dot on the paper.
Regarding the other descriptions involving paper and experiments, these are demonstrations of physics principles such as air pressure, gravity, and light. Blowing air near the edge of a suspended sheet of paper shows how air pressure affects movement. Dropping crumpled and uncrumpled paper from the same height illustrates gravitational force and air resistance. When white light shines on a yellow paper, it reflects yellow light; similar effects are observed with other combinations of light and paper color. Finally, the take-home experiment where you blow over a sheet of paper demonstrates Bernoulli's principle, as the faster air flow over the top of the paper reduces pressure and lifts the paper.