May result in inaccurate experiments from reality, from the lid on the beaker with the paper, plastic and aluminum, expertly are not tight. Make the outside humidity exceeds reality.
May result in an experimental deviation from reality, from the closed beaker with paper, plastic and aluminum Iconium not keep a tight control over outside reality.
May result in the experimental error, from reality. From the cover and a beaker, paper, plastic and aluminum is not tight, moisture content outside in too much reality.