Plasma

Document Sample

```					Plasma: The Fourth State of
Matter

QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
What Do You Know?
• Describe the 3 states of matter using
water as an example and discuss
how water changes from state to
state.
 What causes this change of state?
 What is happening on an atomic
scale?
States of Matter
3 states of mater          • What causes the
• Solid – water freezes it     change of shape?
turns into ice. Solids     • Heat
do not change shape
• Cold
easily
• Temperature
• Gas – when the water
boils it vaporizes.
Gases move very fast
• Liquid – move slowly
What happens at an atomic level?
• Atoms are always vibrating
• The hotter substances the more the atoms
vibrate.
• The cooler the substance the less the atoms
vibrate.
What is happening on an
atomic scale?

• Removing or adding heat causes the motion
of atoms to change.
• The hotter substance the more the atoms
move.
• The colder the substance the less the atoms
move.
The 3 States of Matter Activity
• Add 100mL of water to
• Drop the chunk into the
water
• Observe the reaction and                 QuickTime™ and a
TIFF (Un compressed) decompressor

find the 3 states of matter.
are neede d to see this picture.

• Write 1 sentence to
describe each state of
On an Atomic Scale: Solids
• The molecules/atoms
in a solid are bonded
together and cannot
change their position.
QuickTime™ and a
TIFF (Un compressed) decompressor
are neede d to se e this picture.   • This allows a solid to
maintain its shape
without a container.
On an Atomic Scale: Liquids
• The liquid bonds are
strong enough to hold
the molecule/atoms
together but weak
enough that they can
slide along the surface
of neighboring atoms
• Liquids have no shape
and can only maintain
the shape of their
container.
On an Atomic Scale: Gases
• Although the bonds that
hold the molecules of gas
together are strong, the
bonds that hold them next
to each other are very
weak.
• The bonds that hold the
molecules together are too
weak to hold them next to
each other, allowing gas
molecules to drift apart
randomly.
What are the Driving Force of all
Changes of matter?
Energy
• Adding Energy speeds the motion of
molecules
Plasma, the Fourth State of
Matter
• The bonds that held gas
molecules together are
broken and even the
electrons surrounding the
QuickTime™ and a
nucleus of atoms are
TIFF (Uncompressed) decompre ssor
are neede d to see this picture.     broken free
• Positively charged nuclei
and negatively charged
in random patterns
Characteristics of Plasma
• The most abundant form
of matter in the universe
• Behaves like a gas,
BUT…
QuickTime™ and a
• An overall neutral state of   TIFF (Unc ompres sed) dec ompres sor
are needed to see this pic ture.
matter
• Components are charged
ions (positive and
negative)
Naturally occurring Plasma

QuickTime™ and a
Qu ic kTime ™ a nd a
TIFF (Unco mpres sed ) de co mpress or
are ne ed ed to se e th is p ic ture.
TIF F (U ncompressed) decompressor
are needed to see this picture.

Quic kTime™ and a
QuickTime™ an d a
TIFF (Uncompressed) decompressor
are need ed to see this p icture .
TIFF (Unc ompres sed) decompres sor
are needed to see this picture.
• Energy is added to a
system
QuickTime™ and a
• Molecules are broken          TIFF (Uncompressed) decompressor
are needed to see this picture.
apart into their individual
atoms
• Electrons are stripped
from their nuclei
• Used for lighting,
precision cutting, nuclear                Qu i ckTi m e™ a nd a
TIFF (Un co mp res se d) de c omp res so r
a re ne ed ed to se e th is pi c tu re.

research and fusion power
So What’s the difference between
a gas and plasma?
• Gas is electrically neutral throughout and is
used as an electrical insulator
• Plasma is electrically charged and used as a
conductor of electricity

```
DOCUMENT INFO
Shared By:
Categories:
Stats:
 views: 15 posted: 6/29/2011 language: English pages: 15