Mr. Ruark’s Earth Science Thought of the Day- What is radiation and how does it affect Earth? • Warm Up: Answer each question in today’s box. • 1. What waves are in between ultraviolet and gamma rays on the spectrum? • 2. What three types of radiation DO NOT penetrate the atmosphere? • Name one use of radio waves in this classroom! • Cool-Down: Have a great weekend! Daily Objective(s): Students will determine the importance of solar energy in the atmosphere. Day 28 Unit 2: Meteorology
Mr. Ruark’s Earth Science Thought of the Day- What is radiation and how does it affect Earth? • Warm Up: Answer each question in today’s box. • Look around the room. Name one thing in this room that uses radio waves! • 2. Name something in this room that utilizes microwaves. • Which IS harmful to humans? • A. radio waves B. gamma rays C. microwaves D. visible light • Cool-Down: True or false: X-rays travel way faster than radio waves. Daily Objective(s): Students will determine the importance of solar energy in the atmosphere. Day 27 Unit 2: Meteorology
Review and Introduction to Radiation • Go to WCBOE.DISCOVERYEDUCATION.COM • You may be automatically logged in. IF NOT, USE: • email@example.com • Password: 95zalznR! SEARCH FOR “ELECTROMAGNETIC SPECTRUM,” CLICK “EXPLORATION” (FIRST ITEM!
Solar Energy The Effects on Earth’s Atmosphere Unit 1: Meteorology Chapter 19.2
Sun’s Radiation • Atmosphere is heated by solar energy. • Absorbed by gases in atmosphere and the land and ocean surfaces. • Energy is given off as heat.
Radiation • Energy travels from Sun to Earth as radiation. • Radiation- all the frequencies or wavelengths of electromagnetic spectrum • Travels as waves • Visible light is an example- it is radiation that our eyes can detect • Other forms are: Radio, Microwaves, Infrared, Visible Light, Ultraviolet, X-Rays and Gamma Rays.
How the Sun heats the Earth. • https://www.youtube.com/watch?v=dg_DOM1OQoo
Radiation • Travels at a very high speed (300,000 km/s) • Types of radiation differ on the length from crest to crest • Called wavelength • Longer waves- Radio, Microwave, Infrared • (Visible Light) • Shorter waves- Ultraviolet, X Rays, Gamma Rays
Atmosphere and Solar Radiation • Solar radiation passes through the atmosphere in several ways. • Upper atmosphere absorbs almost all shorter wave radiation (Thankfully!) • If this did not occur, life as we know it would not exist! • Think of the worst sunburn and it would be much, much worse. • BLOCKED RAYS: Gamma Rays, X-Rays, Ultraviolet Rays
Atmosphere and Solar Radiation • Most solar rays that reach the lower atmosphere as: • Radio waves, Infrared, visible light • Have you ever seen the fuzzy/snowy background noise on a radio with no station? • How about the snowy background of a TV with no station on? • You are actually seeing and hearing the Sun’s radio waves!
Scattering- What Makes the Sky Blue? • What disrupts solar radiation and causes scattering? • Clouds • Dust • Water Droplets • Gas Molecules • Scattering makes the sky blue in the day and multi-colored at sunrise/sunset!
Reflection • Solar Energy is either reflected or absorbed by the surface. • Depends on factors such as color- white reflects more than black! • Albedo- the fraction of solar radiation that is reflected off the surface of an object. • Example: You can see the moon. It does not give off its own light, rather, it is like a mirror and reflects light to your eyes. This is albedo!
Absorption and Infrared Energy • Infrared is detected by us as heat. • Snakes and other animals can actually see heat- we can detect it through touch. • Absorption of radiation heats the lower atmosphere and creates that “warm blanket” of air that allows us not to freeze/boil.
Mirages • A mirage is when warm air bends light waves. Have you seen these? Where?
WebQuest Activity • https://wcboe.discoveryeducation.com/player/view/assetGuid/f983fe78-090b-49dd-98b7-72bab9aee071
Website • MRRUARKEARTHSCIENCE.WEEBLY.COM