Grade: all
Subject: other

#4374. Endothermic reaction

, level: all
Posted Wed Apr 29 10:46:29 PDT 2009 by Heather (Heather).

Heather Owens

Date: 4-29-09
Grade Level: 2nd grade

P.EN.E.1 Forms of energy
Learning Resources and Materials
Colored pencils
Development of Lesson
Zip lock bags
Plastic spoons
Baking soda

Before doing the experiment students will watch a PowerPoint on endothermic and exothermic reactions. The PowerPoint will also include the instructions on how to complete the experiment. Each student will receive a blank copy of the kidspiration writing a science experiment hand out.

The students will fill in what they want to find out. In this case the experiment is what kind of reaction occurs when baking soda is added to vinegar. Each student will have a ziplock bag. The students will add 1/8 cup vinegar in a plastic bag. They will feel the outside of the plastic bag where the vinegar is. They will note that the vinegar is at room temperature. They will then stir in 1 tablespoon of baking soda. The students will watch the reaction and then feel the bag. The class will all copy these instructions on their hand out into the section that says, what steps will I take. In the results section the students will write whether the bag got colder or hotter. Under the what does this mean section the students will decide whether the reaction was endothermic or exothermic.

For special needs students I will have them work with a partner or I would demonstrate the experiment for them. If they cannot spell yet I will have them draw pictures of the experiment.
After the experiment I will go over the results with the class. At the end the students will know what kind of reaction happened and why.