States of MatterSolid, Liquid, and Gas

3rd Grade

Objectives

Students will be able to;- Identify three states of matter; solid, liquid,

and gas.- Identify the differences between a solid, a

liquid, and a gas.- List examples of how one state of matter can

change to another.

What do you know about the 3 states of matter?

Use your pen tool to draw a line from a picture to it’s corresponding state of matter. Raise your hand when you are finished.

Liquid Solid Gas

pencil water steam from coffee

Let’s see how you did!

The pencil is a solid, the water is a liquid, and the steam from the coffee is a gas.

Liquid Solid Gas

Let’s Explore Matter Everything around you is matter- the chair you are sitting on, and even the air you are breathing. You are matter too. All matter has some things in common. For instance, all matter takes up space. Matter is found on Earth in one of three states- solid, liquid, and gas. Matter in each if these states has different properties. A solid has a definite shape and a definite volume. That is because it’s particles are very close together and are in a regular pattern. The particles move within the solid, but they are held together by an attraction. Heating a solid causes it’s particles to move more quickly, weakens the attraction between them, and melting occurs. Your chair is a solid.

Let’s Explore Matter A liquid does not have a definite shape. However, it does

have a definite volume. The particles that make up a liquid move more quickly and freely than those in a solid. The attraction between them is not as strong as the attraction between the particles in a solid. The particles tumble over and around each other. A liquid flows and takes the shape of the container into which it is poured. Milk is an example of a liquid.

Let’s Explore Matter

A gas does not have a definite shape or volume. The particles that make up a gas move quickly and freely. They don’t have much attraction for one another. A gas spreads out to fill it’s container. The air around you is a gas.

More About Matter• Matter can change states. Solids can become liquids, and liquids can

change to solids. Liquids can become gases, and gases can become liquids. How do all of these things happen? Heat. Heat is either added to or removed from matter to cause state changes.

• Think about an ice cube. If you hold it in your hand, it gets warmer and begins to melt (becomes a liquid). However, if you put water in an ice cube tray and put it in the freezer, it freezes (becomes a solid). Climb out of a swimming pool on a hot day and watch what happens to your footprints as you walk across the cement. The liquid water evaporates to become water vapor in the air.

More About Matter

• Let’s watch a video clip that explains what matter is, how forms of matter are different, and how one form of matter can change into another.

• Click on the video on the next page to view. Raise your hand when you are finished.

Let’s practice

• A solid has a definite shape and does not lose it’s shape. Use your pointer tool to point to the solid.

Air inside a soccer ball shoe orange juice

Let’s practice

• A liquid takes the shape of any container. Use your pointer tool to point to the liquid.

air inside a tire maple syrup rock

Let’s practice• A gas does not have a definite shape or volume and takes up all of the

space in a container. Use your pointer tool to point to the gas.

paint snowman helium inside a balloon

Let’s see what you learnedI will ask the following questions and you will display a green

checkmark by your name if you think the answer is yes, or you will display a red x by your name if you think the answer is no.

1. Does it take up space? Solid/liquid/gas2. Does it have a shape of it’s own? Solid/liquid/gas3. Does it’s shape depend on the shape of it’s container? Solid/liquid/gas4. Can it be seen? Solid/liquid/gas5. Does it always stay the same size? Solid/liquid/gas6. Does it spread out to fill up it’s container? Solid/liquid/gas

I will be looking for volunteers on the microphone to give examples.

Using what you learned

• Look around the room. In what state are most objects? In the chat box, write what state (solid, liquid or gas) most objects are, and list three.

Emoticon Fun

• Find emoticons that are solids and put them in the box.

• Find emoticons that are liquids and put them in the oval.

Homework

Answer the following questions on notebook paper and turn in tomorrow.

1. Indentify something in your body that is a solid, something that is a liquid, and something that is a gas.

2. How could you make one state of matter change to another? Give two examples.

States of Matter Power Point Presentation by Danielle Swartz