sentences
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a prism refracts light
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white light is made of all colors of visible light combined
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refracting sunlight / light causes sunlight / light to split into different colors
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a rainbow is formed by refraction of light by separating light / splitting light into all different colors
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sunlight is made of all colors in the rainbow
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a light wave enters a denser medium
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refraction is when light passes from one medium to another medium
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if a medium is denser , then the medium will be another medium
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a prism refracts light
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a prism is made of glass
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rain droplets are a kind of water droplets
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scattering light decreases visibility
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clouds are made of water vapor / rain droplets
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water droplets scatter light
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fog is a kind of stratus cloud on the ground
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x-rays can pass through some parts of the body
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the medical industry uses medical technology
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doctors sometimes need an image of inside the body to diagnose
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doctors belong to the medical industry
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mechanical energy is used to move something by animals
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joules j are an si unit used for measuring mechanical energy
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an example of an object with kinetic energy is an object in motion
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a ball is a kind of object
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rolling is a kind of motion
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down the hill is a kind of direction
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a metal ball is a kind of ball
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a ball is a kind of object
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rolling is a kind of motion
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moving changes potential energy into kinetic energy and heat energy
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potential energy of an object is determined by the mass and the height of the object
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a roller coaster is a kind of object
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the height of a roller coaster car is known
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a soccer ball is going upward after being kicked
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as the altitude of an object increases , the potential energy of the object will increase
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going upwards means increasing the altitude
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a ball is a kind of object
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a soccer ball is a kind of ball
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substances are made of molecules
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temperature is a measure of kinetic energy of molecules
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water is a kind of substance
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a guitar is a kind of musical instrument
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as matter vibrates harder / faster , the volume of the sound produced will increase
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a string is a kind of object made from matter
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as a string of a musical instrument is plucked harder , the pitch produced will not change
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as a string of a musical instrument is plucked harder , the string will vibrate harder / faster
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there is a sound wave with large amplitude
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as the amplitude of a sound wave increases , the amount of energy in that sound wave will increase
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there is a sound wave with small amplitude
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volume is a property of sound and includes ordered values of quiet / normal / loud
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as the amplitude of a sound wave increases , the volume of that sound wave will increase
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a canyon wall is a kind of surface
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echo is when sound reflects off of a surface
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a person speaking is a source of sound
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echo is when sound reflects off of a surface
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cave walls are a kind of surface
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vibrating matter can produce sound
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objects are made of matter
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a rubber band is a kind of object
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snapping a rubber band can cause the matter in the rubber band to vibrate
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a source of something emits / produces / generates / provides that something
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vibrations are a source of sound
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plucking a string can cause that string to vibrate
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a rubber band is a kind of object
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objects are made of matter
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vibrating matter can produce sound
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tapping two objects together causes the particles in those objects to vibrate
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a source of something produces that something
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vibrations are a source of sound
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glass is a kind of object
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a fork is a kind of object
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the molecules in the wood begin to vibrate from the force of the book
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molecules vibrating can cause sound
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sound is made of sound waves
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sound energy is transferred by vibrational waves
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a rattle is a kind of vibration
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a thunder has intense sound energy
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a window is a kind of object
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intense sound energy can move objects
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matter is made of particles
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air is a kind of matter
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vibration is a kind of motion
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sound requires matter to travel
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something requires motion to travel
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someone plays the flute
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vibrations are a source of sound
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if a flute is played, then the air in the flute will vibrate
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spreading around is similar to spreading in all directions
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sound wave is a kind of wave
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a wave is formed by the vibration of the source spreading around from the source
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sound requires matter to travel
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a vacuum has no matter in it
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blowing air into a whistle causes air to vibrate inside the whistle
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sound waves spread in all directions away from their source
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vibrations are a source of sound
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if the particles are farther away from each other, then the vibrations of particles will spread slower
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sound travels through vibrations of particles
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if the particles are closer to each other, then the vibrations of particles will travel faster
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particles in gas are the farthest away from each other among gas, liquid, and solid state of matter
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particles in solid are closest to each other among gas, liquid, and solid state of matter
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iron is a kind of solid
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