scientific method
A student writes in a laboratory notebook:I placed a piece of iron in a beaker of water and the iron sank to the bottom of the beaker .What the student wrote in the laboratory notebook is an example of a(n)
observation
In an experiment, a factor that changes is called a
varaible
The ratio of an object's mass to its volume is its
density
the amount of space an object takes up is called
volume
100cm ->M
1M
A student examined a patch of mud and recorded several statements about footprints in the mud. Which statement is most likely an inference?
A student examined a patch of mud and recorded several statements about footprints in the mud. Which statement is most likely an inference?
A) There are five footprints in the mud.
B) The depth of the deepest footprint is 3 centimeters.
C) The footprints were made by a dog.
D) The footprints are oriented in an east-west direction.
c
the variable that is changed in an experiment is the
IV
what is the formula for density?
D=M/V
a box has a height of 10cm, a width of 5cm and a height of 3 cm. what is its volume?
150cm3
132kg ->g
132.000g
In order to make observations, an observer must always use
5 senses
the thing you are counting or measuring is the
DV
what is the density of an object with a mass of 50g and a volume of 100ml?
0.5g/ml
what tool do you use to find the volume of a irregular solid?
graduated cylinder
25L->kl
0.025kl
A student preformed an experiment designed to test the rate of evaporation of different solutions. He had different beakers containing water mixed with various substances, as well as one with just water. The beaker containing only water is known as the
control
things that stay the same in a experiment are called
constant
Gold has a density of 19.3 g/ml. what happens to the density if I cut the block in half?
it stays the same
a graduated cylinder is filled to the 25ml line. I dropped a rock in and it goes up to 32ml. what's the volume of the rock?
7ml
566M -> km
0.566km
To determine how many miles per gallon a car gets, a driver put 10 gallons of gasoline in the car and recorded the distance it traveled until it ran out of gas. What would a scientist call the driver's actions?
an experiment
You want to test which size of soccer ball is easiest to juggle with your feet. You count the seconds the ball stays in the air for each of the trials. what are the IV and DV?
IV - size of the ball
DV - seconds in the air
how can you tell if something will sink in water?
if its density is greater than 1 g/ml
the method of find ing the volume using a graduated cylinder is called
displacement
123mg -> kg
.000123kg