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What's Happening in My World?

Curriculum Tie:

Time Frame:
2 class periods that run 15 minutes each.

Group Size:


Students look for examples of chemical and physical changes in the world around them.

Main Curriculum Tie:
Science - 5th Grade
Standard 1 Objective 3

Investigate evidence for changes in matter that occur during a chemical reaction.

For the Teacher:

  • Examples of items that have undergone physical change. (For ideas, see "Background for Teachers".)
  • Examples of items that have changed due to a chemical reaction.
For the each student:
  • "What's Happening in my World" worksheet.

Background For Teachers:
Physical changes, which do not change the composition of matter, and chemical changes, which do change matter to new kinds of matter, are happening every day in our environment. Physical changes include water evaporating, clothes drying in a dryer, changing the size of food items, chopping wood, erosion, etc. Chemical reactions include fruit rotting, food spoiling, rust, decay of plants, burning wood, silver tarnishing, cooking and baking, etc.

Intended Learning Outcomes:

  1. Observe and report.
  2. Compare events.
  3. Know and understand science information.
  4. Describe and explain observations.
  5. Cite examples of how science affects life.

Instructional Procedures:
Step 1: Discuss the difference between a physical change and a chemical reaction. Ask: "What are some physical changes that occur in our environment?" List several on the chalkboard. Ask: "What are some chemical reactions that occur in our environment?" List several on the chalkboard.

Step 2. Give the students the "What's Happening in My World" worksheet. [Attached below.] Assign each student to find four physical changes and four chemical reactions that have not been listed on the chalkboard. Discuss how students might find these examples.

Suggestions: Interview parents, observe carefully, look at reference materials, observe someone who works with garbage disposal, interview someone in the food industry.

Step 3. When students return with their information, discuss the importance of physical changes and chemical reactions in our daily lives.


Assessment Plan:
Evaluate the student worksheets for accuracy.

Take the students on a walking quiz. Instruct them to bring paper and pencil. On your walk point things out and ask students to identify them as either physical changes or chemical reactions. Examples could be:

  • car burning gas (chemical)
  • sweat evaporating from skin (physical)
  • dirt added to puddle (physical)
  • cooks baking bread in school kitchen (chemical)
  • sun burning skin (chemical)
  • rust on car (chemical)
  • wood ground to sawdust (physical)

Utah LessonPlans

Created Date :
Aug 23 2002 14:49 PM