Tuesday 9;30-10;30

Nsb 1st floor

Extra OH Wed 9:00-10:50am

Cell is smallest living thing that can perform all functions of life

Nutrition, organisms healthy and alive

Communication, can tell other cells to kill virus & bacteria that invade our cells

Reproduction, in order to live longer,

Cell theory All life forms are made from one or more cells Cells only arise from pre-existing cells

Virus is not a type of cell The cell is the smallest form of life

Different organelles made of atoms and molecules Matter, Elements, and Compounds

Matter (salt): is made up of compounds Element (Na, Cl): is a substance that can not be broken down to other substances

Atom Neutrons: smaller particles with no electrical charge Protons: pos charge Electrons: neg charge

Atomic Number and atomic Mass Mass number = number of protons + neutrons Atomic number = # protons

Isotopes All atoms of an element have the same # of protons but may differ in # of neutrons Are two atoms of an element that idffer