Today’s Catalyst

1. What is the difference between a physical and chemical change? Write your answer in complete sentences.

2. Classify the following as either a physical or chemical change:

a. Plants make sugar from carbon dioxide and water

b. Water vapor in the air forms frost

c. A goldsmith melts a nugget of gold and pulls it into a wire

The States of Matter

The three states of matter are: solid,

liquid, and gas.

These three states of matter differ in

terms of compressibility, structure,

shape, and volume

Foldable Time

Foldable

Compressibility

Structure

Shape

Volume

Solid

Liquid

Gas

Kinetic Molecular Theory of Matter:

Based on the idea that particles of

matter are always in motion.

Theory has 3 basic assumptions

(but we are only going to cover

the first 2)

Assumption #1 Matter is composed

of small particles

(molecules)

Assumption #2

The molecules are in

constant motion. This

motion is different

for the three states

of matter.

Solid Compressibility: Not

compressible

Structure: Particles are packed together in fixed position

Solid Shape: Definite shape

Volume: Definite volume

Liquid Compressibility: more

compressible than a solid, but

barely compressible

Structure: Individual molecules

do not stick together

Liquid

Shape: Indefinite Shape (takes

the shape of its container)

Volume: Definite Volume

GAS Compressibility: Highly

compressible

Structure: Gas particles do

not stick together

GAS

Shape: Indefinite Shape (takes the

shape of its container)

Volume: Indefinite Volume; gases

expand to fill whatever volume is

available

Copyright© by Houghton Mifflin Company.

All rights reserved.

13

Guided Practice

Maverick Races!

Take out a dry erase marker and whiteboard

Draw a circle on your whiteboard. Label the circle ‘Solid’ Draw the

structure of the solid’s particles in your circle

Solid

Answer:

This state of matter has neither a

definite shape nor a definite volume. On

your whiteboard write down the name of

this state.

Answer:

Which two states of matter have

a definite volume?

Answer:

•Solid and Liquid

Draw a circle on your whiteboard. Label the circle ‘Liquid’ Draw the

structure of liquid’s particles in your circle

Liquid

Answer:

In which states of matter do the

particles have movement?

Answer:

•Solid, Liquid,

and Gas

Add Up Your Points:

Who is the Horse

Race Champion??

Trash Talkin’ RAFT

Role A state of matter (solid, liquid,

gas)

Audience A different state of matter

(solid, liquid, gas)

Format Trash Talkin’ Letter

Topic Properties of state of matter

(why is your state great and the other

not??)

My Example:

Oh hey solid, I heard you have a bone to pick with me. I

heard you said I smell like gas. I AM GAS and that smell

must be your upper lip! If you think you can keep up with

me you’re dead wrong. While you have to stay put

because you have a definite shape and volume, I roam

freely and fill whatever space and volume I can. You are so

stubborn solid. When people try to press you down, you

don’t let them. You are incompressible! I go with the flow

and am highly compressible. Finally, I hope you enjoy

having all your particles packed together the way you do.

My particles are free to stretch out. Just quit being so

uptight!

Homework Due TOMORROW

Pure Substances

and Mixtures

Pre-Reading