8th Grade Science Guide

8.1: Chemistry 3 Dimensions & Progressions

Unit 2

Activity: Precipitate Forming

Objective

Overview

Materials

● I can identify patterns in data to determine if a chemical reaction took place.

● Reactions of Lead Nitrate with Potassium Iodide, and Calcium Chloride with Sodium Hydroxide are

● Lesson Plan

shown to the students to learn about precipitate formation as a sign of a chemical change.

Activity: Light Forming

Objective

Overview

Materials

● I can identify patterns in data to determine if a chemical reaction took place.

● Teacher will perform

● Magnesium metal, bunsen burner, tongs ● Nitrate salts such as cupric, sodium, aluminum, strontium, calcium, lithium, etc. ● Heet or alcohol with

demonstrations of 1 or more reactions that produce light such as burning Magnesium metal strips, burning a hydrocarbon, or fame tests with metals (in Heet or alcohol). Students will observe the light and explain how it is evidence that a chemical change is occurring. ● Students will perform or watch one or more of the following reactions to see that temperature changes are a sign of a chemical reaction. Possible reactions include: H 2 0 2 and yeast, Alka-seltzer and water, or HCl with Zinc (reaction releases H 2

containers to perform the reactions in

Activity: Energy in Reactions

Objective

Overview

Materials

● I can identify patterns in data to determine if a chemical reaction took place.

● (Depends on what reaction you want to show) ● Hydrogen peroxide, yeast ● Alka-seltzer and water ● HCl acid and mossy Zinc