<p>Science 8 Name: ______Ms. Jamieson Date: ______Block: _____</p><p>Textnotes Chapter 4.3 Light and the Electromagnetic Spectrum (Read pages 152-160 in the Text and answer the questions)</p><p>What is radiant energy? = energy that is carried by electromagnetic (use the glossary) waves</p><p>What is the = visible light energy and all the invisible electromagnetic forms of radiant energy spectrum?</p><p>List the 7 kinds of = radio waves, microwaves, infrared waves, electromagnetic waves visible light, ultraviolet waves, x rays, gamma rays</p><p>Which 3 kinds of waves = radio, microwave and infrared are longer than visible light?</p><p>Describe 3 ways that 1) radio radio waves are used 2) television 3) magnetic resonance imaging (MRI) to see inside our bodies and diagnose illness</p><p>List 3 ways that 1) Microwave ovens heat foods microwaves are used (one 2) Radio telescopes learn about distant planets of these isn't in the and galaxies book!) 3) Cell phones</p><p>List 3 ways that radar is 1) Tracking movement of cars, boats, airplanes 2) weather forecasting used 3) RADARSAT satellite collects information about water, icebergs, floods</p><p>List 5 ways that 1) Remote control for television and video Infrared is used 2) Computers use infrared to read CD ROMs 3) heat lamps 4) airports to screen people with a fever 5) LANDSAT uses infrared to study forests What is the other name = Heat radiation for infrared radiation?</p><p>List 3 uses of ultraviolet 1) enables your body to make vitamin D (UV) radiation 2) forensics to study fingerprints 3) kill bacteria in food, water and medical supplies What 3 problems can be cause by UV rays? 1) sunburns 2) skin cancer 3) damage to the surface of the eye</p><p>List 3 uses of x-rays 1) used to photograph teeth and bones 2) screening luggage at airports 3) photograph the insides of machines and engines Where do gamma rays come from? = nuclear reactions</p><p>List one use of gamma - used in radiation therapy to kill cancer rays cells</p><p>Which electromagnetic waves have the longest = radio waves wavelength?</p><p>Which electromagnetic = gamma waves waves have the shortest wavelength?</p><p>Which electromagnetic = gamma waves waves have the highest energy?</p><p>Which electromagnetic = radio waves waves have the lowest energy?</p><p>What is the relationship = as the wavelength gets smaller the energy between wavelength and increases amount of energy?</p>