Science Chapter 1

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