Show:
volume and mass
mass changes in closed systems
characteristic property's
solubility
separations of mixtures
100
how do you calculate the volume of a rectangular box
you use length x width x height
100
What do you do if you find condensation in a jar?
you wipe it off
100
why is mass not a property of a substance rather then of an object
mas is not a property of a substance because it can change depending on the amount of the substance you have
100
What is the difference between quantitative and qualitative observations.
qualitative observations uses your senses while quantitative uses numbers.
100
What was the original substances that formed petroleum
vegetable and animal matter at the bottom of shallow seas
200
why is the volume of a liquid often essayer to find the volume of a liquid then a solid
because you only need to read a graduated cylinder
200
what are the conditions to create a closed system
everything must be closed.
200
how do you calculate the density of a substance
you divide its mass by its volume
200
why is it dangerous to drink burner fuel even though one of its ingredients is edible
because they are at different concentrations
200
how can you distinguish oxygen using a glowing splint
it will burst into flames
300
how do you read the volume of a liquid in a graduated cylinder
you read the cylinder at eye level
300
in lab 2.5 did the total mass of the copper and sulfur change
it should not have changed
300
what is the flat section on a graph mean?
it means that theirs a constant change in the substance
300
what affect dose burning gasoline and coal have on the environment.
when coal is burned it produces sulfur dioxide which causes acid rain
300
can a substance be completely dissolved
it depends on the substances
400
what dose the tar button do on a electric balance?
it zeros of the balance
400
how are the laws of nature made
they are found through patterns of nature
400
is the boiling point of a substance affected by amount?
no it is not affected by the amount.
400
why is lead solder no longer used in water supplies systems
the lead would dissolve in the water causing lead poisoning
400
how can drinking water be obtained from sea water
by separating the salt from the sea water
500
What is an advantage of using a single pan balance other then an equal arm balance
it gives an accurate measurement of the mass
500
theirs an old saying what goes up most come down does this express a law of nature?
yes this depicts gravity.
500
how many characteristic properties must be the same so that you can say that the substances are the same
all of the ones being tested
500
when sugar is dissolve in water which one is solvent
the solvent is water
500
What two characteristic properties must differ to be separated
boiling point and density