Science
define biology
study of living organisms
what is the independent variable?
the tested factor
what 3 things is an atom made up of?
protons
neutrons
electrons
water is a ___ molecule meaning it has an unequal charge
polar
what are the small repeating units that make up a polymer?
monomers
name 4 (of the 8) characteristics of life
1- made of one or more cells
2- displays organization
3- growth and development
4- reproduces
5- requires energy
6- maintain homeostasis
7- adaptations evolve over time
what is the dependent variable
the one that depends on changes to the independent variable
what is the difference in a covalent and an ionic bond?
covalent- strong bond, shared electrons
ionic bond- loss/gain of electrons
the bond that is between the hydrogen of one water molecule and the hydrogen of another water molecule
hydrogen bond
the head region of a lipid is ___
hydrophilic
what is the difference in a theory and a law
a theory is an explanation of a natural phenomenon supported by many observations
a law describes relationships under certain conditions
what is a hypothesis
a testable explanation to a phenomenon
in an endothermic reaction the ____ has more energy than the _____
products; reactants
acids release ___ into water
Hydrogen ions
proteins are made up of ____
amino acids
what was Jane Goodall known for?
studied chimpanzee behavior
why do we need a control group in an experiment?
to compare the results to
the control group is what would happen under normal conditions
what is the purpose of an enzyme?
to speed up biological reactions
distinguish between a homogenous and heterogeneous mixture
homogenous- same throughout
hetergeneous- remains distinct
what is the difference in a saturated and unsaturated fat?
saturated- no double bonds, harder to break
unsaturated- 1 double bond, easier to break
what was Mary-Claire King known for?
discovered BRACA1 and BRACA 2 genes and that breast cancer is inherited through a mutated copy of one of these genes
what is the difference in an obervation and an inference
an observation is something you see
an inference is you determining a rational explanation for the obervation
what is an isotope?
the same element with a different number of neutrons
what is the function of a buffer
to neutralize an acid or a base
carbohydrates are made up of ___
monosaccharides