Science 10_Quarter 2_Module 4

1 Department of Education National Capital Region Schools Division of Paranaque City Self-Learning Modules Science 10 Quarter 2 Week 4 Effects Electromagnetic Waves on Living Things and Environment Learning Competencies (Essential Competencies) 1. Explain the effects of Electromagnetic (EM) radiation on living things and the environment(S10-FE-11e-f-49) Objectives: 1.1 Explain the effects of Electromagnetic Waves Application on Living things and the Environment. 1.2 Evaluate the risk and benefits derived from the application of Electromagnetic wave. Let’s Recall (Review) Directions: Read the given questions then choose the correct answer from the choices.Write your answer in your answer sheets. Choices: Radiation, Non-ionizing radiation, Ionizing radiation, Wavelength, Frequency, Energy. _____1. The distance between identical points(adjacent crests) of wave form signal propagated in space or a long wire. _____2. Is the emission or transmission of energy in the form of waves. _____3. Is a type of energy released by atom in the form of electromagnetic waves. _____4. It is the number of concurrences as repeating event per unit of time. _____5. It is define as the capacity for doing work. Let’s Understand (Study the Concept) Our bodies can absorb electromagnetic radiation as energy, meaning molecules in the tissue directly exposed to radiation get excited. In other words, they heat up. This is exactly what happens when we sunbathe. The molecules in our skin are excited by waves in the sunlight and thus sunshine feels warm on our skin. The heat caused by the non-ionizing ray of sunlight is considered less harmful. The energy emitted by electronic devices is magnitudes lower than that of the sun. Energy is directly proportional to the radiation’s frequency. Ultraviolet light — the kind that has a high potential to.

2 cause skin cancer — has a frequency of around 10 to the power of 16, while low intensity microwaves found with cell phones have a radiation of around 10 to the power of 9. The table shows the effects of Radiation in the Human Body, Figure 1. Classification of Effects of Radiation Source:www.env.go.jp>chemi>rhn>basic info.

3 Task 1. Picture Analysis: The diagram shows the Common Sources of Radiation.Study the figure then classify the sample/material as to what type of Electromagnetic Radiation( EMR) Figure 2. Common Sources of Radiation Source: Media Source Center.

4 Forms of Electromagnetic Radiation Scientific Technology Classification of EMR (Non- ionizing/Ionizing radiation) Power & Technology Ex. High power antenna Non-ionizing radiation Radio Frequencies Microwaves Infra-red UV rays X-rays Gamma radiation.

5 Task 2: The table shows the application of Electromagnetic wave/spectrum. The technology listed were classified as non-ionizing and ionizing radiation . Read/study and make your own conclusion on the effects of Electromagnetic Radiation in human’s health. Let’s Apply Forms of Radiation and their Uses Radio Your radio captures radio waves emitted by radio stations, bringing your favorite tunes. Radio waves are also emitted by stars and gases in space. Microwave Microwave radiation will cook your popcorn in just a few minutes, but is also used by astronomers to learn about the structure of nearby galaxies. Infrared Night vision goggles pick up the infrared light emitted by our skin and objects with heat. In space, infrared light helps us map the dust between stars. Visible Our eyes detect visible light . Fireflies, light bulbs, and stars all emit visible light. Ultraviolet Ultraviolet radiation is emitted by the Sun and are the reason skin tans and burns. "Hot" objects in space emit UV radiation as well. X-ray A dentist uses X-rays to image your teeth, and airport security uses them to see through your bag. Hot gases in the Universe. also emit X- rays Gamma rays Doctors use gamma-ray imaging to see inside your body. The biggest gamma-ray generator of all is the Universe..

6 Let’s Analyze: Figure 3.Effects of Electro Magnetic Radiation Source: rbej.biomedcentral.com Task 3. Matching type: Match column A with column B Column A. Terms related to EMR Column B. Health Deficiency 1. Gamma Rays a. skin cancer, premature aging, blindness, sunburn 2. X-rays b. skin cancer 3. Ultra violet c. sunburn 4. Visible light d. headache and harm body cells including infertility 5. Microwave e. kills healthy cell and cause mutations 6. Radio waves f. internal heating of the body tissue 7. Infrared g. damage central nervous system/cells.

7 Let’s Try Picture Analogy: Study the figure. Figure 4. Electromagnetic Radiation Spectrum and its Biological Effects Source:electromagnetic radiation. pinterest.com Task 4: List down Positive and Negative Effects of Electromagnetic Radiation in Living Organism and Environment Radio Waves Ultra Violet Rays Microwaves X-rays Positive Effects Negative effects.

8 Let’s Create POSTER MAKING!! Goal: Make your own poster, show your creativity draw your idea about the positive/negative effects of Electromagnetic Radiation on Living Things and environment. Materials: Short size bond paper, coloring materials Role: Assume that you are a painter, and you want to relate your idea about the content of the lesson. Do what pleases you. . Product Performance: Self Made poster Standards Content (Clarity of information) 10 points Color Harmony 5 points Neatness 5 points.