Lesson 14.1 Notes1. Energy that is stored in an object is potential
energy. 2. The energy of motion is kinetic energy. 3. Electrical energy can be used to run appliances. 4. Chemical energy is energy that is stored inside
matter (a form of potential energy). 5. Mechanical energy is energy an object has due to its
motion (a form of kinetic energy). 6. Light energy is energy that can be seen. 7. Sound energy is energy that can be heard. 8. Thermal energy is energy from heat.
Lesson 14.2 Notes:
1. Light is a form of energy that you can see and travels in waves.
2. The high point of a wave is called a crest.
3. The low point of a wave is called a trough.
4. The distance from one crest to the next crest is called the wavelength.
Properties of Light
Lesson 14.2 Notes:
1. Reflection- when light waves bounce off a surface
2. Refraction- when light waves pass through an object and are bent as they go through
3. Absorption-when light waves are taken into an object
4. Transmission- when light waves pass through an object
Behavior of Light
Lesson 14.2 Notes:
1. The color of an object depends on the color of light that it reflects.
2. White light is made up of all the colors of the rainbow.
3. ROY G. BIV- colors of the rainbow in order from the longest to the shortest wavelength.
Colors of Light
Lesson 14.3 Notes1. Sound is produced by vibrations of matter. When a
material vibrates, it creates sound waves.
2. The energy of the sound wave and the distance the vibration object is from the listener are 2 factors that determine the volume of the sound.
3. Frequency is the number of crests and troughs produced in a given amount of time. Frequency determines pitch.
Sound
Lesson 14.3 Notes
1. Outer ear- part of the ear you can see; gathers sound waves from the air and funnels them to the eardrum.
2. Eardrum- thin flap of skin that vibrates when sound waves hit it.
3. Middle ear- contains 3 tiny bones that pick up vibrations from the eardrum.
4. Inner ear- has coiled tubes filled with fluid that vibrate causing nerve cells to send signals to the brain.
How You Hear Sound
1. conduction-The transfer of thermal energy from particle to particle between two objects that are touching
3. heat-A measure of how much thermal energy is transferred from a warmer substance to a cooler substance
Lesson 14.4 Notes1. Thermal energy is the kinetic energy of tiny moving particles
of matter. 2. The hotter a substance is, the faster its particles move. The
colder the substance, the slower its particles move. 3. Heat is a measure of how much thermal energy is transferred
from one substance to another. 4. Thermal energy is transferred by conduction, convection, or
radiation. 5. In conduction, 2 objects need to touch in order to share
thermal energy (ex- hot stove touching a pan).6. In convection, thermal energy is transferred in liquids and
gases (warm air rises, cooler air sinks). 7. In radiation, thermal energy is transferred by waves without
matter (ex- heat from the sun travels through space to Earth).
Thermal Energy