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Changing Phases!!!
We know there are three states of matter!
Your state of matter . . .
⚫ . . . Depends on how closely bound your
molecules are!!
⚫Solids have molecules that are tightly
bound together!
⚫Liquids have molecules that are loosely
bound together!
⚫Gases have molecules that have virtually
no binding!!!
Changing States . . . .
⚫ Matter can actually change states!
⚫ A solid can become a liquid . . .
⚫ A liquid can become a gas . . . .
⚫ A gas can become a liquid . . . .
⚫ A liquid can become a solid . . .
⚫ And – sometimes – a solid can become a gas!!
⚫ But how?!?!?!
It’s all about the temperature!
⚫If you change the
temperature of
matter, you can
sometimes change its
state.
⚫Think about water . . .
. It’s the easiest
example!!!
⚫Let’s start with a block
of ice . . . .
. . . And we’ll heat it up!!!!
⚫ What will happen to the
ice if we raise the
temperature?
⚫ Sure . . . It will melt?
⚫ Why?
⚫ Well, because we are
adding energy to the
molecules in the ice.
They start moving
around and their bond
loosens.
⚫ The solid becomes a
liquid!!!
. . . And we’ll heat it up some more!!!
⚫ What happens if we keep
heating it up??
⚫ Well, that water will boil!
⚫ And it will change to a
gas!!!
⚫ Steam that comes off a
boiling pot is still water, but
it is in a gaseous form!!!!
⚫ The molecules now have
LOTS of energy and can’t
stay close together!!!
⚫ It’s evaporation!!!
. . . Now let’s cool it down!!!
⚫ There is always
water vapor in
the air!!
⚫ If you cool it
down, you can
make it into a
liquid . . . .
⚫ It’s called
condensation!!!
⚫ Let’s do it!!!!
Raising/Lowering Temps . . .
⚫ . . . Changes states of matter!!!
⚫If you raise the temperature, you can
change a solid to a liquid to a gas!!
⚫If you lower the temperature, you can
change a gas to a liquid to a solid!!!

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changing phases of matter

  • 2. We know there are three states of matter!
  • 3. Your state of matter . . . ⚫ . . . Depends on how closely bound your molecules are!! ⚫Solids have molecules that are tightly bound together! ⚫Liquids have molecules that are loosely bound together! ⚫Gases have molecules that have virtually no binding!!!
  • 4. Changing States . . . . ⚫ Matter can actually change states! ⚫ A solid can become a liquid . . . ⚫ A liquid can become a gas . . . . ⚫ A gas can become a liquid . . . . ⚫ A liquid can become a solid . . . ⚫ And – sometimes – a solid can become a gas!! ⚫ But how?!?!?!
  • 5. It’s all about the temperature! ⚫If you change the temperature of matter, you can sometimes change its state. ⚫Think about water . . . . It’s the easiest example!!! ⚫Let’s start with a block of ice . . . .
  • 6. . . . And we’ll heat it up!!!! ⚫ What will happen to the ice if we raise the temperature? ⚫ Sure . . . It will melt? ⚫ Why? ⚫ Well, because we are adding energy to the molecules in the ice. They start moving around and their bond loosens. ⚫ The solid becomes a liquid!!!
  • 7. . . . And we’ll heat it up some more!!! ⚫ What happens if we keep heating it up?? ⚫ Well, that water will boil! ⚫ And it will change to a gas!!! ⚫ Steam that comes off a boiling pot is still water, but it is in a gaseous form!!!! ⚫ The molecules now have LOTS of energy and can’t stay close together!!! ⚫ It’s evaporation!!!
  • 8. . . . Now let’s cool it down!!! ⚫ There is always water vapor in the air!! ⚫ If you cool it down, you can make it into a liquid . . . . ⚫ It’s called condensation!!! ⚫ Let’s do it!!!!
  • 9. Raising/Lowering Temps . . . ⚫ . . . Changes states of matter!!! ⚫If you raise the temperature, you can change a solid to a liquid to a gas!! ⚫If you lower the temperature, you can change a gas to a liquid to a solid!!!