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
0.010
known value of 10cm3 gc
.1
guess value of 50cm3 gc
.1
known value of 50cm3 gc
1
guess value of 50cm3 gc
.1
known value of 100cm3 gc
1
guess value of 100cm3 gc
.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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