Homework: Read pages 58-61 in textbook, Finish Vocab sheet- if not finished in class DoNow: Write...

JANUARY 7, 2014 Homework: Read pages 58-61 in

textbook, Finish Vocab sheet- if not finished in class

DoNow: Write Down Homework Take out last nights homework (Cornell

Notes Summary) Begin Completing Do Now Question on

page 56 in notebook:

LOOK AT FIGURE 15 ON PG. 57

-Why does pumping more air into a basketball increase the pressure inside the ball?

The greater the number of gas particles inside the basketball

Means more particles are moving and colliding inside the ball,

Which means more are pushing on the sides of the ball ( container), which increases the outward push of the gas.

Results in increased pressure.

ANSWER QUESTION BELOW ON PAGE 55/56 IN NOTEBOOK:

What conditions can affect the volume of a

gas?The temperature and pressure of a gas and the volume of the container it is in.

HELIUM IN THE TANK VS. HELIUM IN THE BALLOONS Look at Figure 14 on page 56: How is the Helium in the tank different from the helium in the balloons?

The helium in the tank is at a higher pressure and takes up a small space ( occupies a smaller volume) at higher pressure the helium is compressed.

How does gas apply pressure?

The gas particles collide with one another and the walls of their container Ex: the balloon inflating

The firmness of a gas filled object comes from the pressure of a gas.

Higher pressure means a greater concentration (greater amount) of gas particles in a container then in the area surrounding the container.

GAS PRESSURE IS CAUSED BY GAS PARTICLES PUSHING ON THE WALLS OF A CONTAINER

Is the air pressure higher inside or outside the balloon? Inside

—Why?

WHY DID THE BALLOON DEFLATE?

LETS SEE HOW VOLUME, TEMP. & PRESSURE RELATED…

1) What happens to the motion of gas molecules when temperature increases?

They move faster

2) When you shake the box quickly what are the contents inside modeling?

The Gas particles at high temperature The faster the particles move the higher the temperature…

ANSWER IN NOTEBOOK ON PG. 56:

As “temperature,” increased, how did the pressure applied by the, “gas particles,” change?

The pressure increased—gas particles hit the sides of the box more often