Topic Progress:

Lesson – Chemical Energy: Glow Stick Lab

Overview

Title: Chemical Energy: Glow Stick Lab
Grade: 5th Grade
Duration: 30 Minutes

Standards

Science: – SC.5.P.10.4
Investigate and describe some basic forms of energy, including chemical, electrical,electromagnetic, heat, light, mechanical,nuclear, solar, and sound energy.

Science – SC.5.P.11.1
Investigate and illustrate the fact that the flow of electricity requires a closed circuit (a complete loop).

In this lab from the NEED Project, you will explore:How is chemical energy in the glow stick affected by thermal energy in hot and cold water.

Essential Question

  • How is chemical energy in the glow stick affected by thermal energy in hot and cold water?

Background Information

When energy changes from one form to another, an energy transformation takes place. Every minute of the day, millions of energy transformations occur around the world. There are many different forms of energy such as electrical, thermal, nuclear, mechanical, electromagnetic, sound, and chemical. Due to the law of conservation of energy we know that energy is always conserved in the universe and simply changes from one form to another.

Guiding Questions

  • How does energy affect the motion of an object?
  • How do electrical charges react to other electrical charges?
  • How does one form of energy transform into another form of energy?
  • What are some ways that you use energy every day? Of these, which are examples of energy transformations?

Inquiry Type

  • Controlled Inquiry/Small Groups – Glow Stick Lab

 

Chemical Energy: Glow Stick Lab

Problem Statement

  • How is chemical energy in the glow stick affected by thermal energy in hot and cold water?

Materials

  • Unbroken glow stick (will remain unbroken)
  • 2 Glow sticks of the same color (will be ‘cracked’)
  • 1 Cup of hot water
  • 1 Cup of ice water
  • Colored pencils (optional)

Procedure

  1. Look at an unused glow stick carefully.
  2. Record and illustrate your observations in your guide.What do you see inside the glow stick?
  3. Bend the other two glow sticks until the inside container cracks.
  4. Record or illustrate what the glow sticks look like now.
  5. Place one cracked glow stick in the ice water.
  6. Place the other cracked glow stick in the hot water.
  7. Wait a minute or two.
  8. Record or illustrate your observations.
  9. Discuss.
  10. Based on your observations, how did thermal energy affect the chemical energy in the glow sticks.
  11. Use your Forms of Energy Cards (pages 45) to demonstrate the energy transformations that took place. Write out the transformation in your guide.
  12. Discuss with students what happened. Use the explanation found on page 97