# IPS unit 1 & 2 test

 matter
 the substance of which any physical object consists or is composed
 hypothesis
 an educated guess based on research made prior to the experiment which data analysis of the experiment either supports or denys
 observation
 an act of noticing or perceiving during an experiment as a way of collecting data
 qualitative
 the use of your senses to observe in an experiment
 quantitative
 observations based opon what is recordable, measureable, and numerical data
 volume
 the amount of matter a given space can contain
 cm3
 centimeters cubed always part of the answer for volume
 how to calculate the volume of regular shaped objects
 length x width x hight= volume
 how to read a graduated cylinder
 at bottom of miniscus; the dip of water read to guess value ; the guess is either 0 or 5 to 3 decimals at eye level
 mass
 a quantity of matter
 known value of qbb
 0.01
 guess value of qbb
 0.001
 accuracy of qbb
 0.54
 sensitivity of qbb
 0.01
 known value of 10cm3 gc
 0.1
 guess value of 50cm3 gc
 0.1
 known value of 50cm3 gc
 1
 guess value of 50cm3 gc
 0.1
 known value of 100cm3 gc
 1
 guess value of 100cm3 gc
 0.1
 what happens to salt’s mass when mixed in water
 no change
 what happens to the mass of ice when melted
 no change
 what happens to the mass of copper and sulfer when heated
 no change
 physical change vs chemical change
 physical change can be reverse;;chemical change cannot physical change does not create a new substance; chemical change does in a physical change the chemical compound is the same; in a chemical change the chemical compound is altered
 conservation of mass
 In all changes the mass stays exactlly the same provided nothing is added or escapes
 law of nature
 a natural or physical phenomenom that occurs the same way every time
 scientific notation
 a method used by scientist to make very big or very small numbers easier to read or write; for example; .000034= 3.4 x 105 34,000,000,000= 3.4 x 1010
 ;M
 the change in mass in an expiremint
 Mi
 the initial mass the mass before the expiremint is performed
 Mf
 the mass after the performance of the expiremint;
 calculating the M;
 the formula is; Mf -Mi= M;
 physical change
 a change in the physical properties of a substance such as size or shape ; usually reversable example ice melting; wood burns
 chemical change
 usually irreverseable change involving the rearrangement of atoms of one or more substances and a change in their chemical properties or composition resulting in the formation of at least one new substance example sulfer and copper heated = copper sulfate
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