8th Grade Science Guide

8.2: Physics 3 Dimensions & Progressions

Unit 1

●​ The Waves Gizmo provides an introduction to the basics of transverse and longitudinal wave motion. Using a model

●​ Gizmo

●​ I can compare the motions of transverse, longitudinal, and combined waves. Identify and measure the amplitude, wavelength, and frequency of tension, and density of the medium affect wavelength and wave speed. Determine that wave speed is equal to frequency multiplied by wavelength. Explore the factors that affect wave power, including amplitude, frequency, tension, and density of the medium. Explore the characteristics of combined waves. waves. Explore how amplitude, frequency,

of a spring, students can initiate wave motion by

moving the end of the spring up and down, back and forth, or in circles. Students can observe and measure the amplitude, wavelength, frequency, and speed of waves.

Activity: Musical Instruments

Objective

Overview

Materials

●​ Students will build and play musical instruments that allow them to compare the relative wavelengths and hear the resulting sounds. ●​ By increasing the energy used to make the sounds (blowing harder) students will compare the sound

●​ Lab Sheet ●​ Boomwhackers - can purchase on Amazon ●​ Row Your Boat ●​ Twinkle Little Star

●​ I can explain how a wave's amplitude is

related to the energy of a wave using several models to support the explanation. (qualitative & quantitative)

changes made when amplitude changes.

Activity: Light Probes

Objective

Overview

Materials

●​ I can draw a model that shows the patterns of

●​ Students use a light probe and various light sources to measure light intensity and relate it to amplitude.

●​ Lab Sheet ●​ Vernier monitor and light intensity probe, meter

how a wave’s amplitude is related to the energy of the wave.

stick, masking tape, different light sources