Why spiders can walk in the water?
Paragraph 1: Introduction.— Data from literature: dimples created in surface of water by epineuston arthropods, water transport in xylem of plants, water vapor capture by desert lizards, small plastics in Great Pacific Garbage patch. Observations from laboratory exercise: paperclip resting on surface of water, dome-shaped drop of water on lab bench, conveyance and retention of water in capillary tube.
Paragraph 2: Atomic level.—Atomic structure. Ionic and covalent bonds. Covalent bonds of water molecule. Greater electronegativity of oxygen. Unequal sharing of electrons. Polarity of water molecule.
Paragraph 3: Molecular level.—Molecular structure. Hydrogen bonds. Adhesion and Cohesion. Surface tension.
Paragraph 4: Ecological/Evolution level.— Epineuston Communities. Adaptations of epineuston arthropods: hairs/hydrophobic cuticle, high mobility for efficient active predation and other behaviors (<link is hidden>territoriality).
Paragraph 5: Conclusions.—Brief synopsis: unequal sharing of electrons => hydrogen bonds => surface tension => evolution of epineuston ecosytems. Revision of hypotheses