P.S. Chapter 19 Crossword
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
 
 
Down: 1) Materials that absorb or reflect all light and you cannot see objects through them.2) Electromagnetic waves that have the highest frequency and are the most penetrating of all the electromagnetic waves.3) Electromagnetic waves that have a wavelength slightly shorter than visible light.5) Light produced by heat.6) The bending of waves caused by a change in their speed.10) The only part of the electromagnetic spectrum you can see, or light.11) Radio waves of the highest frequency and energy14) Occurs when a wave strikes an object and bounces off.16) Electromagnetic waves with a shorter wavelength and higher frequency than ultraviolet radiation. Across: 4) Ligh that produces lightout without excessive loss of energy due to heat.7) Materials that allow light to pass through and you can clearly see objects through them.8) The classification of electromagnetic waves, either by wavelength or frequency9) The form of electromagnetic radiation with very long wavelength and very low frequency12) the transfer of energy by electromagnetic waves13) Radiation from the sun, which has a wavelength slightly longer than light.15) Materials that allow light to pass through but you cannot clearly see objects through them.17) A piece of glass or plastic made up of many parallel slits.18) The bending of waves around a barrier19) The process of varying radio waves20) Tiny bundles of radiation that make light
 

 

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