Waves - Science 7 PDF

Science 7  QUESTIONS What are the things you love to do during summer? Why do we go to the beach during summer? How do you think these waves and ripples are produced? LET US MAKE WAVES!  LET US MAKE WAVES! What comes to your mind when you hear the word wave? Waves ...

Science 7  QUESTIONS What are the things you love to do during summer? Why do we go to the beach during summer? How do you think these waves and ripples are produced? LET US MAKE WAVES!  LET US MAKE WAVES! What comes to your mind when you hear the word wave? Waves  TABLE OF CONTENTS TYPES OF ANATOMY OF 01 02 WAVES WAVES WHAT ARE WAVES?  Waves are produced when objects vibrate or oscillate. A wave transports energy from one point (source) to another point. There are waves that need to have a medium in order to travel. Any material in which the waves travel is called medium. Waves can be categorized according to their ability or inability to transfer energy through an empty space called vacuum.  TYPES OF WAVES Electromagnetic Mechanical Waves Waves Electromagnetic Waves capable of transmitting its energy through a vacuum do NOT require a medium  EXAMPLES OF ELECTROMAGNETIC WAVES MERCURY VENUS It’s the closest planet to Venus has a beautiful the Sun and the smallest name and is the second one in the Solar System planet from the Sun EXAMPLES OF ELECTROMAGNETIC WAVES  Mechanical Waves NOT capable of transmitting its energy through a vacuum requires a medium  TYPES OF MECHANICAL WAVES LONGITUDINAL TRANSVERSE WAVES WAVES  TYPES OF MECHANICAL WAVES MERCURY VENUS It’s the closest planet to Venus has a beautiful the Sun and the smallest name and is the second one in the Solar System planet from the Sun  TYPES OF MECHANICAL WAVES Transverse waves have an oscillation perpendicular to the direction the wave travels. TRANSVERSE WAVES  TYPES OF MECHANICAL WAVES Longitudinal waves have an oscillation along /parallel to the direction the waves travel. TYPES OF MECHANICAL WAVES  ANATOMY OF WAVES Do you know what helps you make your point clear? Lists like this one: They’re simple You can organize your ideas clearly You’ll never forget to buy milk! And the most important thing: the audience won’t miss the point of your presentation  ANATOMY OF WAVES Do you know what helps you make your point clear? Lists like this one: They’re simple You can organize your ideas clearly You’ll never forget to buy milk! And the most important thing: the audience won’t miss the point of your presentation  ANATOMY OF WAVES Do you know what helps you make your point clear? Lists like this one: They’re simple You can organize your ideas clearly You’ll never forget to buy milk! And the most important thing: the audience won’t miss the point of your presentation  SUMMARY CREST is the highest point in a wave.  SUMMARY TROUGH is the lowest point in a wave.  SUMMARY AMPLITUDE is the height of the crest or the depth of the trough.  SUMMARY WAVELENGTH is the measure of the horizontal distance between two (2) successive crests/troughs.  SUMMARY FREQUENCY is the number of crests or troughs that pass through a point every second.  SUMMARY PERIOD is the time to generate one complete wave.  ELECTROMAGNETIC SPECTRUM MERCURY VENUS Venus has a beautiful name and is the second planet from the Sun Frequency is inversely proportional to wavelength. As frequency increases, wavelength decreases.  ELECTROMAGNETIC SPECTRUM MERCURY VENUS Venus has a beautiful name and is the second planet from the Sun Energy is directly proportional to frequency. As energy increases, frequency increases.  ELECTROMAGNETIC SPECTRUM MERCURY VENUS Venus has a beautiful name and is the second planet from the Sun Wavelength is inversely proportional to energy. As wavelength increases, energy decreases. LET US APPLY! LABEL THE PARTS OF WAVES  LET US APPLY! How are waves important in our daily lives? Why is it important not expose ourselves often to some electromagnetic waves?  LET US MAKE MEANING! Movements of waves undergo compression and expansion. In life, we experience situations wherein we are too compressed or stressed with so many things to do (e.g. paper works in school). What are the values that we should possess in order to overcome these challenges?  Closure Share a phrase that shows what you learned from the discussion.