Chapter 3 - Water and Life Flashcards
1
Q
polar covalent bond
A
A covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electronegative atom, making it slightly negative and the other atom slightly positive.
2
Q
polar molecule
A
A molecules (such as water) with an uneven distribution of charges in different regions of the molecule.
3
Q
cohesion
A
The linking together of like molecules, often by hydrogen bonds.
4
Q
adhesion
A
The clinging of one substance to another, such as water to plant cell walls by means of hydrogen bonds.
5
Q
surface tension
A
A measure of how difficult it is to stretch ort break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding of surface molecules.
