Chapter 8Chapter 8Lesson 3Lesson 3

SPI’S

Before we get started… let’s Before we get started… let’s review:review:

What have we learned in our previous lessons in Chapter 8?

Lesson 1:Lesson 1:What is matterWhat is matter

Lesson 2: Lesson 2: The Difference between The Difference between Physical and Chemical Physical and Chemical

propertiesproperties

Work with a partner:Work with a partner:

TTake a few minutes to look at ake a few minutes to look at the photos and captions in the photos and captions in

chapter 8 Lesson 3. chapter 8 Lesson 3.

See if you can figure out the See if you can figure out the main idea of this lesson.main idea of this lesson.

RAISE YOUR HAND IF YOU THINK RAISE YOUR HAND IF YOU THINK YOU KNOW THE MAIN IDEA OF YOU KNOW THE MAIN IDEA OF

LESSON 3.LESSON 3.

IN THIS LESSON THE IN THIS LESSON THE MAIN IDEA IS…MAIN IDEA IS…

HOW MATTER CHANGES STATE

HAVE YOU EVER HAVE YOU EVER WONDERED?WONDERED?

Where water goes when Where water goes when it’s boiled in a pot on the it’s boiled in a pot on the

stove?stove?

Who Can Tell Me…Who Can Tell Me…

What happens to a frozen What happens to a frozen ice pop that is left in the ice pop that is left in the

sun?sun?

These are both examples These are both examples of how matter changes of how matter changes

state.state.

QUICK…QUICK…WHAT IS THE MAIN IDEA WHAT IS THE MAIN IDEA

OF THIS LESSON?OF THIS LESSON?JUST MAKING SURE YOU’RE PAYING ATTENTON JUST MAKING SURE YOU’RE PAYING ATTENTON

HOW MATTER CHANGES HOW MATTER CHANGES STATE!STATE!

Let’s read “Why It Let’s read “Why It Matters…”on Matters…”on

P. 306 to learn more P. 306 to learn more about how matter about how matter

changes state.changes state.

VOCABULARYVOCABULARY Learning a few new words… Learning a few new words…

Take Out Your Science Journal

conden

satio

n

sublimatio

ndeposition

evaporatio

n

melting

Thermal energy

vaporization

VOCABULARYVOCABULARY

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

VOCABULARYVOCABULARY

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

VOCABULARYVOCABULARY

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

VOCABULARYVOCABULARY

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

VOCABULARYVOCABULARY

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

VOCABULARYVOCABULARY

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

VOCABULARYVOCABULARY

Vaporization (vay-pore-uh-zay-tion) – change of state from a liquid to a gas as energy is added.

Who can tell me what Who can tell me what we’re learning in this we’re learning in this

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

Dry Ice

Deposition:Deposition:The opposite of The opposite of

sublimation. sublimation. It is the change of state It is the change of state

from gas to solid.from gas to solid.

Who can give me an example of deposition?

Who Can Give An Example Who Can Give An Example of Deposition:of Deposition:

Frost

The main idea of this The main idea of this lesson is to learn what?lesson is to learn what?

How Matter Changes How Matter Changes State.State.

Time to strut your stuff:Time to strut your stuff:(You can use your books)(You can use your books)

On a sheet of paper, answer On a sheet of paper, answer questions 1-5 on P. 313. questions 1-5 on P. 313.

Remember to use complete Remember to use complete sentences and correct sentences and correct

punctuation.punctuation.

There will be a test over There will be a test over Chapter 8, so study, study, Chapter 8, so study, study,

study!!!study!!!

Okay, one last time… What Okay, one last time… What was the main idea of lesson was the main idea of lesson

3? 3?

On the count of 3 let’s all say it… 1…2…3…

HOW MATTER CHANGES HOW MATTER CHANGES STATE!!! STATE!!!

Way to go, champs!!!