Light+&+Sound

** Physics Topic __//LIGHT & SOUND//__ **


 * **PHYSICS is…** ||

__ Physicists __ study different types of energy. They investigate and explain things like movement, heat, nuclear energy, light and electricity. Some engineers use their knowledge of physics to make sure buildings are strong and cars are safe. Physics knowledge is also used in electronics & computer design.
 * The study of the behaviour of natural and manufactured things and reasons for their behaviour. __Physics is concerned with movement and different forms of energy such as light, heat, electricity and nuclear energy. Branches of physics include acoustics, the study of sound.__

Some __forms of energy__ include... __ Light Energy: __ Burning chemicals, very hot objects and stars all release light energy. Light energy from the sun, called solar energy is used by plants to make their food (stored chemical energy). __ Heat energy: __ Heat is a form of energy that hot objects have. If heat energy is taken away from an object it becomes cooler. __ Kinetic energy: __ Any moving object has kinetic energy. If something has more kinetic energy it moves faster, if something has more mass it has more kinetic energy. __ Sound Energy __ : Sound is a form of kinetic energy caused by vibrating objects. it travels from place to place as sound waves.

Energy can be converted from one type to another but it can never be destroyed. ||

** //Learning Aims// **
 * Describe the different types of energy and give examples.
 * Understand that light and sound are forms of energy.
 * Describe the characteristics of light.
 * Explain how light is produced and how we see objects that don’t produce their own light.
 * Define reflection, absorption and transmission of light.
 * Explain why mirrors produce images and other surfaces do not.
 * Be able to illustrate the law of reflection.
 * Describe the characteristics of sound and the transmission of sound to explain how sound is produced and how it travels through the air.
 * Define reflection, absorption and transmission of sound using examples.
 * Recognise situations where ear protection is necessary.
 * Compare the transmission of light and sound.

**// GLOSSARY  //**
 * Word ||  Definition  ||
 * Light Energy ||  Burning chemicals, very hot objects and stars all release light energy. Light energy from the sun, called solar energy is used by plants to make their food (stored chemical energy).  ||
 * Sound Energy ||  Sound is a form of kinetic energy caused by vibrating objects. It travels from place to place as sound waves.  ||
 * Luminous ||  Produces its own light.  ||
 * Non -luminous ||  Doesn’t produce its own light.  ||
 * Bioluminescent ||  Living things that are Luminous.  ||
 * Incandescent ||  Emits light because it is hot.  ||
 * Transmission ||  The movement of energy. When energy passes through a substance.  ||
 * Reflection ||  Occurs when light or sound is bounced off the surface of a different substance to that which it is travelling through.  ||
 * Absorbance ||  Absorbance happens when energy is captured by a substance and is not reflected or transmitted through it.  ||
 * Transparent ||  A substance that is clear and allows light to pass through it completely without scattering, enabling a clear image of what it is on the other side.  ||
 * Translucent ||  Allows light to pass through but some light may be scattered or absorbed causing a less clear image.  ||
 * Opaque ||  Light is unable to be transmitted at all so no image is visible.  ||
 * Incident ray ||  Ingoing ray of light.  ||
 * Reflected ray ||  Outgoing ray of light.  ||
 * Vibrations ||  Fast back and forward movements.  ||
 * Decibel ||  Unit of measurement for sound (dB).  ||

// ** Resources  ** //
 * ** What is energ  **__**  y  **__ ** [] **
 * **How do we hear?** **  []  **