Unit 1 Flashcards
What is biology?
The study of life
Anedotal evidence
Not something very reliable, sounds more like a story
Causational Evidence
Seeing the cause, knowing the variable and controlling them
Seeing the cause, knowing the variable and controlling them
Causational evidence
Correlational evidence
Seeing the numbers, comparing, no control over variables
Seeing the numbers, comparing, no control over variables
Correlational evidence
Spurious meaning
Not reliable
What are isotopes
Dooferen forms of an element
What determines the atomic number
The number of protons
What determines the atomic weight
The protons and neutrons combined
What are the 6 most common elements in the body?
Nitrogen, oxygen, hydrogen, carbon, sulfur, and Phosphorus
What is a molecule
Two or more atoms combined together
What is an element
A molecule with two or more atoms of the same type
What is a compound
An molecule with two or more different atoms
What is a chemical reaction
Old bonds break to form new ones creating a new substance
Reactants
What is put in
Products
What comes out
What are the 3 important chemical bonds?
Ionic bonds
Covalent bonds
Hydrogen bonds
What is a ionic bond
One atom donates an electron completely to another atom to get rid of the extra electron, completing their outer shell
What is non-polar covalent bond
A bond that results from the sharing of electrons
What is a polar covalent bond
One atom keeps the electrons around them making it negatively partially charged while the other atom has little to non electrons making it positively partially charged
What is a hydrogen bond
A bond between molecules not the atoms
Why do atoms bond together
To fill their valence electron shell
