GRADE: Third

CONTENT STANDARD: Physical Science

CONTENT TOPIC: Matter

CONCEPT: Matter undergoes physical and chemical changes.

CONTENT OBJECTIVE: 3D3.00 To understand physical and chemical changes in matter

INSTRUCTIONAL OBJECTIVES: The learner will:

3.01 identify properties of materials as they undergo physical changes, such as size, form, shape, heated, expanded, cooled, or contracted.
3.02 identify properties of a material as it undergoes chemical changes.

I. Physical change of materials
II. Chemical change of materials

TN COMPONENT OF SCIENCE: Unifying Concepts of Science

TN GOAL:

To enable students to acquire scientific knowledge by applying concepts, theories, principles and laws from life/environmental, physical, and earth/space science.

2.5 CHANGE - Interactions within and among syatems may result in changes in the properties, position, movement, form, or function of systems.

2.5b Cycles of change can be extended in scales of time, space, and material.

BENCHMARK: Changes can occur slowly or quickly within any system.

BENCHMARK: Materials may combine to form new materials. The properties of the new materials may be unlike the original materials.

TIME REQUIRED:

One class period

Chalkboard; 1 rusty nail, 1 smooth nail; 1 apple, 1 container apple juice; 1 chunk of wood, 1 chunk of charred wood; corn kernels, popcorn; banana, banana chips; small boxes to put each group of items in; drawing paper, coke bottle, baking soda, vinegar, poster board, bulletin board

Raise your hand if you look exactly the same today as you did in 1st grade. Think of one way you have changed. Tell your neighbor. (Discuss). You have changed in size, age, etc. But you are still YOU!

Today we will learn about two kinds of changes: Physical change and chemical change.

(Write the terms on the chalkboard and say together:

PHYSICAL CHANGE and CHEMICAL CHANGE.) A physical change is change in size, shape, or state of matter. Ice that melts is still water, even though it has changed states. That is an example of a physical change.

A chemical change completely changes the object. A nail or tin can will rust. Your bicycle or other metal toy left out in the weather will rust. That is also a chemical change. A piece of paper that burns undergoes a chemical change.

Divide children into groups of 4. Give each group a different box of items to compare and contrast. Discuss among the group. Each group makes a chart describing the "before" and "after" of the item, and decide if it has undergone a physical or chemical change. Rotate the boxes to all groups.
Suggested items:

1. apple - apple juice (physical)
2. chunk of wood - charred wood (chemical)
3. corn kernels - popcorn (physical)
4. smooth nail - rusty nail (chemical)
5. banana - banana chips (physical)
6. Whole sheet of paper - torn pieces of paper (physical)

Today, we have learned about physical and chemical changes. On your paper write at least three different items that you know of that have undergone either a physical or chemical change. Use this format:

1. Changed from __________ to __________

Bring a treat for your classroom either popcorn or banana chips. enjoy!

Marie Curie was a Polish physicist who discovered the radioactive element radium. Radium is now used to treat the disease. Thanks to the determination of skill and courage of this woman, many cases of cancer can be treated or controlled.

This is the time this file has been accessed since 05/18/97.

The University of Tennessee at Martin is not responsible for the information or views expressed here.

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