phase changes
what is the freezing point of water
0 degrees Celsius
A stapler is used to staple 100 papers, it jams 5 times during the trial. A different brand of stapler performs the same test; it jams 22 times. Find the independent variable
independent is that you used a different brand of staples
if you have been hurt during a lab what do you do?
tell the teacher
what are the five states of matter
liquid, solid, gas, plasma, Bose/Einstein.
what is chemistry the study of
matter and energy
what is vaporization?
liquid to vapor
an apple is cut into slices. Half of the slices qre sprayed with lemon juice. All slices are stored in a sealed plastic bag. After 4 days, they are observed to see how brown they turned find the dependant variable
you look and see how brown the apple has turned
what should you not where in a lab
sandals, loose clothing, and dangling jewelry.
does solid have a defonote shape?
yes
define matter
any substance that takes ups space
what is condensation?
vapor to liquid
put one baby fish in a fish bowl full of salt water and a nother one in a non-salt water fish bowl and see which one grows bigger. find the dependant variable
mesuring the size both of the fish
if you are using a substance in a test tube where do you point the end of the test tube
away from everyone
does liquid have a definite volume
yes
what determines the state of matter in a substance
motion of particles
what is ionization
gas to plasma
pillbugs are placed in a contianer where they have a choice of wet or dry environment. researchers record how much time was spent on each side. what is the independant and the dependant variable.
independent: the wet and dry environment
dependant: the time spent in both sides
true or false work areas should be kept clean, tidy, and unclutterd
true
do the particles in a solid move
yes, very slow
what makes plasma different from a regular gas
it is a solid and a liquid
what is deioniziation
plasma to gas
two plants are grown using the sma e light and pots. one plant is given water that has been microwaved and then the other plant is given tap water. their heights are measured after 2 weeks find the independent and the dependent vairable
dependent: the muesured height
independant: one is given microwved water and the other was given tap water
true or false: it is ok to pick up broken glass with your bare hands as long as you put it in the trash bin.
what are the three main shapes of matter
liquid, solid, gas
wich states of matter of have a definite volume
liquid and solid