bio101 exam 1

4 elements make up 96% of living matter

• Calcium, phosphorus, potassium, sulfur
• Carbon, hydrogen, oxygen, nitrogen
• Zinc, copper, selenium, iodine
• Iron, magnesium, sodium, chlorine

H2O is ____ because oxygen is greedy

• nonpolar
• polar
• ionic

H-bonds are...

• unable to link

• weak

• strong

• strong in numbers

when water evaporates....

• it cools in the breeze

• it dries the surface

• it absorbs heat

• it makes you hotter

water is a great ___

• absorbstion

• cooling agent

• solvent

hydrophilic ions with changes...

• covalent

• ionic

• non-polar

• polar

cohesion and adhesion working together =

• Water displacement
• Fluid dynamics
• Surface tension
• Capillary action

definition of Acid:

• A substance that releases protons (H+) in a chemical reaction.

• A compound that does not react with water.
• A substance that accepts electrons in a chemical reaction.

?

• benzene

• hydroxyl

• amino

• phosphate

?

• methyl

• nitrile

• phosphate

• carboxyl