Materials: large plastic containers, push pins and water source.
Children use play, observation, metaphors and a puzzle to explore the idea of pressure.
Using simulations and videos, students reinforce their understanding
of the behavior of particles in solids, liquids and gases.
to the image on the next slide.
a second hole
about 3 inches
(7 cm) above the
first.
at least 1 inch (2.5 cm)
from the bottom.
two holes
in the jug.
liter plastic jug
fill the milk carton with water?
1. The holes are not the same size
or not punched completely through.
2. The bottom hole is not punched
on the flat edge of the jug.
3. The bottle cap is left ON the jug.
4. The jug is not lifted off the ground,
so the result is not obvious.
Do this either outside or in your bathtub.
Lift the jug off the ground to see clearly.
What happens?
and top holes in the same way?
in the bottom of the carton
from all the water above it,
so it squirts out straighter and farther.
shoot out the farthest?
if you are on the bottom.
The children on
the bottom are under
more PRESSURE
than the child on the top.
on the TOP or
on the BOTTOM?
Why?
The water in the bottom of the bottle
is under greater PRESSURE from above.
So the water on the bottom
is squeezed harder and shoots out farther.
at A
or B
or C
do not deliver much water
when the two in the middle
are in use.
2. Does adding more and more heat raise or lower the pressure?
3. Does adding more and more molecules or atoms with the bicycle pump increase the temperature or only the pressure?
on Electra.
the red button.
watch the gauges!
it raises the pressure.
2. As the particles become a gas,
it raises the pressure.
3. The temperature rises immediately. The pressure only begins to rise
as particles become a gas.
as you increased the
pressure of a gas, you also
container it is in
to a liquid is called
to a gas is called
