How Does Matter Change State? by 5d8rBO

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									Chapter 8
 Lesson 3

       SPI’S
Before we get started… let’s review:
What have we learned in our previous
        lessons in Chapter 8?
          Lesson 1:
        What is matter


           Lesson 2:
The Difference between Physical
    and Chemical properties
      Work with a partner:

  Take a few minutes to look at the
   photos and captions in chapter 8
              Lesson 3.

See if you can figure out the main idea
             of this lesson.
RAISE YOUR HAND IF YOU THINK YOU
KNOW THE MAIN IDEA OF LESSON 3.
 IN THIS LESSON THE MAIN
                 IDEA IS…



HOW MATTER CHANGES STATE
HAVE YOU EVER WONDERED?

Where water goes when it’s
boiled in a pot on the stove?
     Who Can Tell Me…

What happens to a frozen ice
 pop that is left in the sun?
These are both examples of
how matter changes state.
          QUICK…
WHAT IS THE MAIN IDEA OF THIS
          LESSON?
     JUST MAKING SURE YOU’RE PAYING ATTENTON
HOW MATTER CHANGES STATE!
     Let’s read “Why It
       Matters…”on
P. 306 to learn more about
how matter changes state.
       VOCABULARY
Learning a few new words…

             Take Out Your
           Science Journal
                     VOCABULARY




condensation – change of state from a gas
to a liquid as energy is removed.
                      VOCABULARY




deposition – change of state from a gas to
a solid as energy is removed.
                    VOCABULARY




evaporation – a slow or a gradual change
from a liquid to a gas.
                      VOCABULARY




melting – change of state from a solid to a
liquid as energy is added.
                      VOCABULARY




sublimation – change of state from a solid
to a gas as energy is added.
                      VOCABULARY




thermal expansion – increase in size of a
substance due to a change in
temperature.
                      VOCABULARY




Vaporization (vay-pore-uh-zay-tion) –
change of state from a liquid to a gas as
energy is added.
Who can tell me what we’re
    learning in this lesson?




Think man, think!!!
How Matter
Change State

IF you don’t have it yet, you’ll get it…




      Let’s read “Changes of State”
      on P. 308
             Question
              (Infer)




Why doesn’t a glass of water freeze
solid when ice cubes are added to it?
                 Answer
                 (Infer)




The water has enough energy to melt
the ice cubes.
              Question
          (Cause and Effect)



When the water on your skin
evaporates, it makes your skin feel
cool. Explain what is happening in
terms of state changes and energy.
               Answer
          (Cause and Effect)



Thermal energy from your body is
added to the water, causing it to
evaporate. Your body feels cool
because it is losing thermal energy.
  Apply What You’re Learning




Let’s say a scientist observes that water at the
surface of a small pond is frozen. A thermometer
indicates that the temperature at the bottom of
the pond is 4 degrees Celsius. Can she conclude
the pond is frozen all the way to the bottom?
Explain.
 Apply What You’re Learning




We know that water freezes at 0 degrees
Celsius. Since the water at the bottom of the
pond is 4 degrees Celsius, it is warmer than
the freezing point of water. So, the water at
the bottom of the pool is liquid.
        Skipping a step
    (How does that happen?)


Sometimes, matter can skip the liquid state!!


            What’s up with that?
     Let’s read PP. 310 and 311
      to find out how matter
        Can sometimes Skip
          the liquid state.

While your classmate is reading, listen for the
vocab. words “sublimation” and “deposition”.
Use context clues to better understand their
meanings.
         Sublimation:
A solid changes directly to a
gas without passing through
       the liquid state.


 Who can give an example of sublimation?
Who can give an example of
      sublimation?




         Dry Ice
          Deposition:
The opposite of sublimation.
  It is the change of state
       from gas to solid.


  Who can give me an example
        of deposition?
Who Can Give An Example
     of Deposition:




         Frost
The main idea of this lesson is to
          learn what?
How Matter Changes State.
Time to strut your stuff:
  (You can use your books)
    On a sheet of paper, answer
questions 1-5 on P. 313. Remember
  to use complete sentences and
        correct punctuation.
There will be a test over Chapter 8,
     so study, study, study!!!
Okay, one last time… What was the
      main idea of lesson 3?




 On the count of 3 let’s all say
 it… 1…2…3…
HOW MATTER CHANGES
      STATE!!!




 Way to go, champs!!!

								
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