Lesson Plans

Standard 1

Students will understand that chemical and physical changes occur in matter.

Objective 1

Describe that matter is neither created nor destroyed even though it may undergo change.
• 5 Experiments of Physical and Chemical Changes
The Law of Conservation of Mass states that mass is conserved in physical and chemical changes. Students explore this concept by taking initial masses, making predictions, and finding final masses of physical and chemical changes. Students observe water changing from ice to a liquid, a piece of cardboard being cut up, salt dissolving in water, Alka-Seltzer reacting in water, and water's physical property of cohesiveness being disrupted by soap.
• Blobber
Students will mix ingredients to create a chemical change and "Blobber" - a substance similar to silly putty.
• Changes in Matter, Not in Weight
Students will explore the law of conservation of mass by tearing paper, observing a reaction between baking soda and vinegar, and predicting whether melting, freezing, and dissolving will cause a change in mass.
• Sum of the Parts
The students will use math expressions and equations to discover that the sum of an object's parts is equal to the whole and that in a chemical reaction or physical change matter is neither created nor destroyed.
• TRB 5:1 - Activity 1: Dissolving Salt
This lesson will demonstrate to students that matter, such as salt, may seem to have disappeared when it is dissolved in water, but it is still there.
• TRB 5:1 - Activity 2: Sum of the Parts
This activity will help students discover that the total weight of an object is equal to the weight of its individual parts after being disassembled.
• TRB 5:1 - Activity 3: Melting and Freezing
After completing this activity students will discover that the weight of ice / water will not change after it undergoes melting or freezing.
• TRB 5:1 -- Act. 4: Chem. Reactions - Borax & Glue, Cream
Students will conclude at the end of this activity that the combined weight of the reactants in a chemical reaction is always equal to the combined weight of the products.
• What a Reaction
These two activities will explain the "Law of Conservation of Matter" - matter can neither be created nor destroyed.

http://www.uen.org - in partnership with Utah State Board of Education (USBE) and Utah System of Higher Education (USHE).  Send questions or comments to USBE Specialist - Jennifer Throndsen and see the Science - Elementary website. For general questions about Utah's Core Standards contact the Director - Jennifer Throndsen.

These materials have been produced by and for the teachers of the State of Utah. Copies of these materials may be freely reproduced for teacher and classroom use. When distributing these materials, credit should be given to Utah State Board of Education. These materials may not be published, in whole or part, or in any other format, without the written permission of the Utah State Board of Education, 250 East 500 South, PO Box 144200, Salt Lake City, Utah 84114-4200.