exam 1

atoms with an electrical charge

are lipids composed mostly made of carbon and hydrogen and are they hydrophobic molecules

original research

factors that may change are called variables

results of the chemical reaction

glycerol molecule, two fatty acid tails and a phosphate group (component of cell membranes)

reputable, science background, advertisements, current, references are needed to consider a science source

does a polysaccharide have many sugars, a cell wall, and an external skeletons of insects and spiders

4 fused carbon rings (cholesterol and sex hormones)

statistics is a specialized branch of mathematics

story about original research (book, news report)

stores genetic information, deoxyribose sugar double helix structure

results show true difference between groups/ low probability that difference between groups is due to random chance

powerful broad explanation for related observations/ well supported by different intendent researches

used to avoid unethical or impractical tests on humans

if the predication is false then the hypothesis is rejected and disproven?

substance that dissolves the solute (water)

collect data or information/ test specific hypothesis

powerful solvent promotes contact between solutes

best way to not get a cold

do different amino aid combs = different shapes and properties for proteins

for protein synthesis and ribose sugar

those not changed by the researcher; may change during the experiment (relief of cold symptoms)

negative charge

make hypothesis, make prediction, test prediction

no charge

do not receive the experimental treatment

scientific hypotheses must be testable (possible to evaluate) and falsifiable (potentially false)

does pseudoscience mean explanation

is there is a weak attraction between molecules in hydrogen bonding

do ions have differences in number of protons and electrons

in a polar molecule do different areas have different charges

what's an example of a chemical bond

we use if/ then statements for making predicitions

chemical tinkertoy connector (able to form 4 bonds, up to four elements, and combos of single and double bonds)

a lipid, glycerol and three fatty acid tails (store energy)

statistical test examine differences between groups/ results can extend to entire population

guanine and cytosine go together

covalent: two pairs of electrons

critique by other scientists before publication to increase confidence in results

made of sugar subunits (monosaccharide 1 sugar, disaccharides 2 sugars, polysaccharide many)

substance that dissolves in solvent (lemonade powder)

if the predication is true then the hypothesis is supported but NOT proven?

samples errors can occur by chance on experimental data/ difference between sample and population can be big

untested ideas based on little information

fundamental forms of matter

are proteins joined by peptide bonds which are a sequence of polypeptides

positive charge

solutes that are changed

water loving

making observations, proposing ideas, testing ideas, discarding or modifying ideas based on results

general principle to predict observations

large organic molecules; found in living organisms Carbos, proteins, lipids, nucleic acid, made of monomer subunits

changes in chemical composition of substances

science is a body of knowledge and the discovery of something new and unknown

is water a polar molecule

adenine and thymine go together

water fearing

influence on results

proposed explanations for those observations

statistical tests can't tell us if experiments were designed and done properly/ if observer error occurs

covalent: one pair of electrons

those manipulated by the researcher (drinking tea)

test the effect of a single variable/ limit possible alternate hypotheses/ differences in results due to treatment

made of nucleotide monomer subunits

small microscopic, simple, genetic material with no nucleus, no organelles and cell walls

are proteins made of carbon, oxygen, hydrogen and nitrogen

large single celled or multicell,complex, genetic material in nucleus,membrane bound organelles and some with cell walls

combining specific observations to a general principle

limit researcher and participants knowledge of group

in nonpolar molecules are electrons shared equally, have no partial charges and are hydrophobic

based on one persons experience not on experimental data

do these influence statistical significance sample size/ true difference between populations

do observations lead to questions

electrons transferred between atoms

two or more atoms held together by chemical bonds

limit participant knowledge

the smallest units of an element

random assignment to control or experimental group/ identical participation for both groups except for testing treatment

molecules of carbon, oxygen, and hydrogen/ major source of energy for cells