






Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
An overview of various forms of energy, including kinetic, radiant, thermal, motion, sound, electrical, potential, chemical, and nuclear energy. It also includes a science investigation report on the effect of temperature on the brightness of glow sticks, which are a type of chemical reaction. Students are encouraged to conduct their experiment and record their observations and conclusions.
Typology: Lecture notes
1 / 10
This page cannot be seen from the preview
Don't miss anything!
Adapted from The NEED Project, Manassas, VA
Extra copy for Lesson 2 – So teacher can review this info at the beginning of Lesson 2
Lesson 2 Overhead 1 of 6
Adapted from The NEED Project, Manassas, VA
Lesson 2 Overhead 3 of 6
Energy Flow Diagram:
Dried Fruit
Dried
Fruit
Lesson 2 Overhead 5 of 6
Science Investigation Report: Glow Sticks
Light sticks have two chemicals inside them (hydrogen peroxide and phenyl oxalate ester with a fluorescent dye). The hydrogen peroxide is in the plastic tube. The ester is in the glass container inside the plastic tube. If you bend the light stick and break the glass container, the chemicals begin to react and form a new chemical. The chemical reaction also produces light by energizing the dye.
Science Investigation Report
Lesson 2 Overhead 6 of 6
CHEMICAL REACTIONS: LIGHT STICKS
BACKGROUND: Light sticks have two chemicals inside them (hydrogen peroxide and phenyl oxalate ester with a fluorescent dye). The hydrogen peroxide is in the plastic tube. The ester is in the glass container inside the plastic tube. If you bend the light stick and break the glass container, the chemicals begin to react and form a new chemical. The chemical reaction also produces light by energizing the dye.
PURPOSE: To investigate the effect of heat on a chemical reaction.
QUESTION: If you put a light stick into cool water, then into hot (not boiling) water, how does the amount of light produced by the light stick change?
PREDICTION:
MATERIALS: 3 light sticks of the same color, 3 - 250 ml beakers, 3 thermometers, hot, room temperature, and cool water
PROCEDURE: 1. Bend the light stick until the glass container inside breaks, and then shake it to mix the chemicals.
OBSERVATIONS:
CONCLUSION: How does heat affect a chemical reaction?
From The NEED Project, Manassas, VA