Concept 2- Chemistry Of Life Flashcards
What are the six elements necessary for life?
Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Sulfur
What are the levels of organization that make up an organism?
Atom-> molecule-> organelles-> cell-> tissue-> organ-> organ system-> organism
What is the difference between polar and nonpolar molecules?
Polar molecules have an unequal distribution of charges, with one side more positive or one side more negative; dissolves easily in water
Nonpolar molecules have an equal distribution of charges and does not dissolve in water
What are some unique properties of water?
- Becomes less dense when frozen, unlike other liquids
- Liquid water is attracted to itself because of its polarity and cohesion
- Really high boiling point compared to similar liquids
- “universal solvent”
What is matter?
Anything that has mass and occupies space; composed by atoms
What are atoms?
Smallest part of an element that still has the same properties of the element
What is a cell?
The most basic unit of life
What is surface tension?
The tension of the surface of a liquid cause by attraction of molecules in the liquid
What is a solution?
A uniform mixture of 2 or more substances (think Country Time lemonade)
What is a solute?
What gets dissolved in a solution
What is a solvent?
The thing that does the dissolving in a solution
What does hydrophilic mean?
Likes/has affinity for water and usually dissolves in water
What does hydrophobic mean?
Doesn’t have an affinity for water and does not dissolve easily in water
Ex. Oil
