Question | Answer |
science | the knowledge obtained by observing natural events and conditions |
data | raw information |
observation | an act or instnace of noting |
evolution | the world gradually developed |
creationism | says that world was created in 6 days |
irreducidly complex | is a pseudoscientific argument by proponents of intelligent design |
bacterial Flagellan | is a tail-like projection that protrudes from the cell body of certain prokaryotic eurokaryotic cells |
scientific method | refers to a body of techniques for investigating phenomena aquiring new knowledge |
theistic evolution | the world gradually developed |
intelligent deisgn | the world had to havd had a deisgner |
hypothesis | a mere assumption or guess |
qualitative data | is used to describe certain types of information |
theory | refers to contemplation as opposed to action |
quanitative data | os data measured on a numerial scale |
law | is a system of rules usuall enforced through a set of institution |
density | is defined as its mass per unit volume |
mass | is a body of matter, usually of indefinite shape and often of considerable size |
matter | is a general term for the substance of which all physical objects consist |
measurement | a measured dimension |
dimensional analysis | is a tool to find ro check relations among physical quantities by using their dimensions |
scientific notation | also known as standard form or as exponential notation |
elements | one class of substances that cannot be seperated into simplier substnaces by chemical means |
compunds | composed of 2 or more parts elements, or ingredients |
mixtures | an aggregate of 2 or more substances that are not chemically united and that exist in no fixed proportion to each other |
pure substance | is any material with a definite chemical composition |
density | diatomic molecules are molecules composed of 2 atoms |
chemical property | is any of a material's properties that becomes evident during a chemical reaction |
physical change | a change of matter from one form to antoher without a change in chemical properties |
attractive | is an infleunce that causes a free body too undergo a change - its a type of force |
temperature | is a physcial propety of omatter that quantitatively expresses the common notions of hot and cold |
thermal energy | is a part of the total, internal energy of a thermodynomic system or sample of matter that results in the system's temperature |
4 states of matter | solid, liquid , gas, plasma |
phase change | is a transformation of a thermodynamic system from one phase to another |
Charles Law | is a gas law which describes how gases tend to expand when heated |
Boyle's Law | is one ot the gas law and describes the inversely proportional relationship between the absolute pressure and volume of gas |
law of definite proportions | states that a chemical compound always contains exactly the sam proportion of elements by mass |
fission | the process by which a nuclues splits into 2 or more frequencies and releases neutrons and energy |
fusion | the process which light nuclei combine at extremely high temperature |
isotopes | an atom that has the same number of protons as the other atoms of the same elements |
half life | the time required for half of a sample of a radioactive isotope to break down |
part is a atom | nuclues consists of neutrons and protons with electrons flying around it |
energy levels | the number of energy levels that are filled in an atom deoends on the number of electrons |
electrons | a subatomic particle with a negative charge |
protons | a subatomic particle with a positive charge |
neutrons | a subatomic particle that has no charge |
atomic mass | is the mass of a specific isotope of a given atom |
atomic number | the number of protons in the nucleus of an atom |
group number | is a vertical column in the periodic table |
types of bonds formed | ionic bond, covalent bond, metalliac bond |
ionic bond | the attractive force between oppositely charged ions the electrons are transferred from one atom to the other |
covalent bond | a bond formed when atoms share one or more pairs of electrons |
metalliac | a bond formed by the attraction between positively charged metal ions and the electrons around them |
subscripts | the number that comes after the bond to tell you how many of them there is |
octet rule | states that on the last valance electon ring has to be 8 |
electron configuration | is the arrangement of elctrons in an atom |
period number | the rows on the periodic table |
valance electrons | the electrons in the outer energy level of an atom |
electron dot notation | are diagrams that show the bonding between atoms of a molecule |
signs of a chemical reaction | rust, carbon dioxide in water, leaves changins, burning |