BELL R

INGERS

How are peanut butter and jelly sandwiches related to conservation of mass?

BELL RINGER 10/15

The mass of all substances before a chemical change equals the mass of all substances after a chemical change

What factors would effect a pendulum’s swing?

http://www.youtube.com/watch?v=X216zksWZK4

BELL RINGER 8/20/13

BELL RINGER 8/21/13

What did you learn in lab yesterday?

a)How did it go ?

b)What rules should be established?Graph and table

6 trials

1v

c) https://www.youtube.com/watch?v=yPiwd2pocPE

BELL RINGER 8/22/13`

Why is it called a foot?

1. Vid 4. Raw

2. Eq 5. final

3. Sub 6. closure

BELL RINGER 8/26

What pattern is going on?

A. 10 20 30 40 40 50 60

B. 3 13 23 33 43 53 63

C. -110 -120 -130 -140 -150 -160

D. 10^1 10^2 10^3 10^10

E. 1 10 100 1,000 10,000

F. 1E^1 1E^ 2 1E^3 1E^4 1E^5

10 POWER SYSTEMtera- (T-) 1012 1 trillion

giga- (G-) 109 1 billion

mega- (M-) 106 1 million

kilo- (k-) 103 1 thousand

hecto- (h-) 102 1 hundred

deka- (da-)** 10 1 ten

deci- (d-) 10-1 1 tenth

centi- (c-) 10-2 1 hundredth

milli- (m-) 10-3 1 thousandth

micro- (µ-) 10-6 1 millionth

nano- (n-) 10-9 1 billionth

pico- (p-) 10-12 1 trillionth

BELL RINGER 9/4/13

What digit/place value would be uncertain?

A.A paper clip

B.Pen

C.Pencil

D.Blank meter stick

E.Meter stick divided into 10 pieces

F. Meter stick divided into 110 pieces

G..333 cm

BELL RINGER 9/5/13

Questions:

 

1. Look back at your table of data. Do you see any pattern(s) emerging? If so, what pattern(s) do you see?

2. Where does your best-fit line cross one of your axes? What does this mean?

3. Where would you expect the line to cross the axes? Why?

4. Describe how you could use a graph to predict a person’s wingspan.

5. An average 3 year-old is about 91 cm tall. Use your best-fit line to predict his wingspan.

1. When would you use the following graphs?a)Bar graphb)Scatter plot/line graphc)Pie graph

1. How do you label the following?1. Y-axis2. X-axis3. Title

https://www.youtube.com/watch?v=f_J8QU1m0Ng

BELL RINGER 9/6/13- 1ST

What is slope?

What is a y-intercept?

What is slope?

What is a y-intercept?

BELL RINGER 4TH

What is slope?

What is a y-intercept?

BELL RINGER 9/6/13- 5TH

What is slope?

What is a y-intercept?

What is slope?

What is a y-intercept?

BELL RINGER 9/19

Why is it difficult to walk in grassy areas with high heels?

Why would thisconcept be important?

ANSWER

The force due to gravity and the mass of the person is concentrated on a small area (the circular or square base of the heel). This creates a high pressure, when the earth can not push back enough to match this pressure, the heels are pushed into the grass.

This is not limited to sumo wrestlers in heels. A 54kg (120lb) person can exert almost 2000 lbs/ in^2 from a heel by balancing on one foot.

The same concept applies to cleats (football, softball, soccer, track, and baseball) where athletes want more traction.

Area (cm ^2) ½ w= ½ d= r

BELL RINGER 9/24

Why is support area critical to remaining upright?

BELL RINGER

Addy Rogers will you go to homecoming with me?

- Nick

In order to make infrastructure more stable, a larger support area is needed, which makes it more difficult for a push to the center of mass beyond it’s support area. For example the Eiffel tower was designed with a large base, narrowing towards the top of the structure. Without the wide base the tower could blow over in strong wind. The same is true about radio towers, which have strong support cables, called guy wires.

This concept applies to football players and wrestlers who get low making their body more stable.

BELL RINGER

How many people could you shove in a car?

Volume- the amount of space that a substance or object occupies, or that is enclosed within a container

measure of how much stuff could fit into an amount of space of a 3 dimensional object

A= l*wA=1/2 b*hA= pi*r^2

WHAT IS THE VOLUME?

22cm

6cm

WHAT IS THE VOLUME?

22cm

6cm

WHAT IS THE VOLUME?

22cm

6cm

WHAT IS THE VOLUME?

22cm

6cm

WHAT IS THE VOLUME?

22cm

6cm

UNITS

l*w*h= cm*cm*cm= cm^3

Liter- a unit of liquid capacity equal to the volume of one kilogram of distilled water at 4°C and equivalent to 1.0567 U.S. liquid quarts

1 cm^3= 1 cc= 1 mL1/1000 ml= 1L1000 cm^3= 1 L

Why does the water level rise when submerging an object into water?

BELL RINGER 10/1

DOES THE VOLUME CHANGE IF YOU CHANGE THE SHAPE OF AN OBJECT?

B E F O R E A F T E R

DOES THE VOLUME CHANGE IF YOU CHANGE THE SHAPE OF AN OBJECT?

B E F O R E A F T E R

DOES THE VOLUME CHANGE IF YOU CHANGE THE SHAPE OF AN OBJECT?

B E F O R E A F T E R

DOES THE VOLUME CHANGE IF YOU CHANGE THE SHAPE OF AN OBJECT?

B E F O R E A F T E R

BELL RINGER 10/17

What is the difference between mass and weight?

is it the same on the moon?

M A S S

Measurement of an objects inertia= dependent on the amount of matter (atoms) an object possesses.

W E I G H T

• Weight is dependent on mass and gravity

• Weight is a measure of force due to gravity (N)

M A S S

• Is always constant as the object doesn’t change (add or remove mass)

• A 50kg person on earth would still have a mass of 50kg on the moon

W E I G H T

• Dependent on gravity

• Gravity on the moon is about 1/6th of that on earth

• A 110lb person would weigh about 1/6th or 18lbs