Essential Question What’s so great about water?

Properties of Water Single most abundant compound in most living things. Water expands as it freezes = meaning ice is less dense then liquid water. Page 40

Polarity of water 8 protons in nucleus of oxygen 1 proton in nucleus of hydrogen Molecule has a bent shape Oxygen end of molecule Has a slight negative Charge Polar molecule = because there is an uneven distribution of electrons between the oxygen and hydrogn atoms. Page 40

Water Attraction between the hydrogen atom on one water molecule and the oxygen atom on another=Hydrogen Bond Water is extremely cohesive -> molecules on surface draw inward allowing drops on smooth surface to form a bead

Water Water has adhesion easily seen when measuring volume in a graduated cylinder. Page 41

Solutions Solutions=> ALL components are evenly distributed throughout the solution. Page 42

Solute Substance that is dissolved

Solvent Water The substance in which the solute dissolves

Suspension Mixture of water and nondissolved material Blood in HUMAN body is mostly water which contains many dissolved compounds

Water is for life: Every HUMAN body cell needs water because many of the body’s processes, including chemical reactions, take place in water.

What happens to life when the drinking water is unclean?

Water in plant life: Tracheids-plant cells that transport water within plant. Connected end-to- end like a straw. Xylem-transport subsytem that carries water upward from roots to parts of plant Phloem-second transport subsystem transporting solutions of nutrients and carbs produced during photosynthesis. Page 560

Transpiration