Unit 2 Exam Study Guide PDF

Unit 2 Exam Study Guide Test for “A” day on 02/15/24 Test for “B” 02/16/24 This is only a guide for students to use to prepare for the exam. Students need to make sure they have read all the Discovery packets given to them: - U2.1 Types of Waves - U2.2 Color and the Electromagnetic Spectrum - U2.4 T...

Unit 2 Exam Study Guide Test for “A” day on 02/15/24 Test for “B” 02/16/24 This is only a guide for students to use to prepare for the exam. Students need to make sure they have read all the Discovery packets given to them: - U2.1 Types of Waves - U2.2 Color and the Electromagnetic Spectrum - U2.4 Transmission and Absorption - U2.5 Reflection - U2.6 Refraction - All Doodle Notes from each lesson The exam will have 30 multiple choice questions. Students will have 40 minutes for the exam. Review ALL the given information to prepare for the exam. Study Guide: Unit 2 - Light Energy I. Types of Waves (SC.7.P.10.3) A. What are Waves? 1. Definition of Waves Way that energy travels Oscillation from one place to another B. Mechanical Waves 1. Definition Travels through matter Speed varies depending on type of media (gas vs. liquid vs. solid) 2. Examples Sound Ocean Waves Earthquakes C. Electromagnetic Waves 1. Definition Travels through matter AND space 2. Examples Visible Light Radio Waves X-Rays D. Characteristics of Waves 1. Wavelength Distance from any point on one wave to a corresponding point on the next wave 2. Frequency Number of wave vibrations over time (units in Hz) 3. Amplitude Height of a wave/Distance from crest/trough to resting point of wave 4. Wave Speed Speed of a wave; NOT related to wavelength II. Color and the Electromagnetic Spectrum (SC.7.P.10.1) A. EM Waves 1. Can travel through both space AND matter Travel all at the same speed B. Spectrum 1. Know which waves are relative low energy compared to visible light 2. Which waves are higher energy than visible light C. Visible Light 1. Definition Small section of EM spectrum 2. Relative Strength/Frequency of Colors ROYGBIV III. Transmission and Absorption (SC.7.P.10.2) A. Transmission 1. Definition Occurs when light hits a transparent or translucent object Light can penetrate the material; travels all the way through B. Absorption 1. Definition When light energy is taken in by a substance Light is absorbed by matter and converted into energy 2. Relation to heat 3. Application How an object’s material affects absorption of light Interaction with light for black objects vs. white objects IV. Reflection (SC.7.P.10.2) 1. Definition Change in direction of a wave at a boundary between two media Occurs when light hits a surface and bounces back 2. Application How does reflection of light on objects impact our perception of color V. Refraction (SC.7.P.10.2) 1. Definition Change in direction or bending when light moves from one medium to another 2. Application Examples of refraction in real-life; prisms, water, etc. VI. Review and Practice A. Applications in Real Life 1. Reflection and Absorption of Light Understanding how perception of color/images works Scattering of light vs. reflecting of light; how are they different 2. Vocabulary Translucent, Transparent, Opaque