# States of Matter Lesson and Worksheet

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STUDENT MANUAL
FOURTH GRADE SCIENCE / LESSON 5
Lesson 5
The States of Matter
Student Assignment: Today we will study the three states of matter and the differences
between them.
Is an ice cube matter? It takes up space, it has mass, and it has properties. You
discovered that air is matter. Water is also matter. Matter is found in different forms. A
book, water and air in a balloon are examples of states, or forms of matter.
The book is an example of solid matter because it has a definite shape. It takes up a
certain amount of space. All matter is made up of small particles. In a solid object the
particles atoms, are packed closely together.
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STUDENT MANUAL
FOURTH GRADE SCIENCE / LESSON 5
Now, if you leave the ice out at room temperature it will change into a liquid. The
particles in the ice begin to move away from each other and it no longer has a definite
shape. It takes the shape of its container. It still has a definite amount of space no matter
what container it is in.
What will happen when water is in a pan and heated? If the water is boiled, the water will
disappear into a vapor, which is called a gas. Gas does not have a definite shape. It
does not take up a certain amount of space. It will spread all over in the air.
Take a piece of plain white paper.
Lesson Wrap-Up: Discuss the three states of matter.
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STUDENT MANUAL
FOURTH GRADE SCIENCE / LESSON 5
Lesson 5
The States of Matter
NAME: _________________________________________________________________
DATE: __________________________________________________________________
Draw a book and next to it draw a circle. Fill the circle with as many dots as you
can. The dots should actually touch each other.
Draw a fish bowl full of water with a circle next to it. You will make the dots in this
circle just slightly apart from each other; not touching.
Draw a balloon with a circle next to it. In this circle make dots randomly far away
from each other.
Your circle for the book represents particles that make up the matter of a solid object.
Your dots in the circle are close together because it is a solid.
Your circle for the water represents particles that make up the matter of a liquid.
Your dots in the circle which are close but not touching are molecules for a liquid.
Your circle for the vapor of water that is far apart represents a gas. Your dots are
moving around and there is not a definite shape, which are molecules for gas.
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STUDENT MANUAL
BOOK
FISH BOWL
FOURTH GRADE SCIENCE / LESSON 5
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STUDENT MANUAL
BALLOON
FOURTH GRADE SCIENCE / LESSON 5
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