what do the graphs you made describe?
they describe the realtionship between the width of a rubberband and how flexible it is when mass is put on it.
what does the steepness of the line of the graph meassure?
the steepness of the line shows how flexible the rubber band is and how far they streetch.
how is the steepness of the three gpaphs related to the width of the rubber band ?
the 2mm rubber band has the least width and its the steepest. the 5mm rubber band is the middle width and it is steeper than the 12mm line, but less steep than the 2mm line, the 12mm line is the widest but it's line is the least steep . so the thicker the
how is the flexibility of these rubber band related to their widths?
the thicker the rubber bands the less flexible.
explain how someone looking at graph 1 could determine the length of the unstretched rubber band
some one looking at graph 1 could determine the length of the unstretched rubber band by looking at where all the lines start(9cm)
predict the length of each rubber band if a 400-g mass is used to stretch it.
2mm-2.5cm: 5mm-13 cm,12mm-10cm
how could you use the stretching of one of the rubber bands to measure the mass of an unknown object?
you could use the stretching of a rubber band to measure the mass of an unknown object by seeing how flexible it is. the longer it stretches the more mass the object has.
what is science?
1.science comes from the latin word ___________ which means ____________
scientia, knowledge.
a.life science ____________
living things
b. earth science _____________
earth & space
physical science ___________
matter & energy
a.science explains __________
nature
b. scientists ______________
investigate
1.the scientific methods solves _____________
problems
scientific method
a.state the problem
b.gather information
c.form a hypothesis
d. test the hypothesis
e. analyze the data
f. draw conclusions
aa quantity that can have more than a single value
.variable
b. a factor that does not change when other variables do change
.constants and controls
1.represents an idea ,event,or object to help people better understand it.
model
model examples:
computer,simulations,graphs/tables
an explanation of things or events based on knowledge gained from many observations and investigations
theory
example of theory
extinction of dinosaurs
a statement about what happens in nature and seems to hold true all the time
scientific law
example of scientific law
the law of gravity
standard
an exact equantity that people can agree on
modern name for metric
International system of units
volume
amount of space an object takes up
units for volume
mL, L, cm�
density
mass/volume
mass
amount of matter an object contains
graph
visual display of information
relationship of independent vs. dependent
line graph
compares info. by counting
bar graph
breaks down fixed quantity
circle graph
volume of a liquid
mL, L
temperature
K, �C
mass
kg, mg
time
sec
length
km, m, cm
1 L
1 dm�
1 mL= to cm
1 cm�
0 K=
-273�C
100�C to Kelvin
373 K
an explanation based on many observations supported by experimental results
theory
a statement about what happens in nature that seems to be true all time
scientific law
What is precision?
when measurements are close to each other
What info. would you need to determine the accuracy?
exact measurement
independent precision experiment
how well you measured
dependent variable precision experiment
the measurement you get
controls in precision experiment
object and tools
1 m� = to cm
1,000,000 cm�
1L = __ cm�
1,000