What is a wave Where have you seen

What is a wave? Where have you seen them in life?

Waves energy moving through a medium (substance) The energy travels while the medium vibrates

Waves Types of waves Sound

Waves Types of waves Water

Waves Types of waves Earthquake

Waves Types of waves Light

Waves Types of waves “the wave”

Waves Parts of waves

Waves Parts of waves A A: Amplitude – How tall the wave is.

Waves Parts of waves A λ A: Amplitude – How tall the wave is. λ: Wavelength – How long it takes for the wave to repeat its pattern.

Waves Parts of waves A λ A: Amplitude – How tall the wave is. λ: Wavelength – How long it takes for the wave to repeat its pattern. f : Frequency – How many waves pass by us. How often

Waves Parts of waves A λ A: Amplitude – How tall the wave is. λ: Wavelength – How long it takes for the wave to repeat its pattern. f : Frequency – How often the wave passes by us. p: Period – Time for 1 wave to pass by

Waves Period and Frequency These two things are opposites. Frequency measures waves per second. (how many waves) 1 sec Period measures seconds per wave. (how much time) 1 wave

Waves Period and Frequency These two things are opposites. Frequency measures waves per second. (how many waves) 1 sec Period measures seconds per wave. (how much time) 1 wave We can relate these: p=1/f f = 1/p

Vocabulary Amplitude Wavelength Frequency Period The height of the wave. How tall it is from middle to top. In meters. The distance before the wave starts to repeat itself. Can be from top-totop, middle-to-middle, bottom-tobottom. In meters How many waves go past in one second. Measured in “Hertz” (1/s) How many seconds it takes for one wave to pass. Measured in seconds

Equation Wave speed v=f*λ v - Speed of the wave. meters/second f - Frequency of the wave. Measured in “waves/second” or hertz λ - Wavelength. Measured in meters. We can use this with any kind of wave to find out how fast it moves.

Equation Period and frequency p=1/f or f =1/p p - period of the wave. Measured in seconds f - Frequency of the wave. Measured in “waves/second” This equation lets us get period from frequency or frequency from period.

Types of Waves How do waves move? 3 ways for waves to move:

Types of Waves How do waves move? 3 ways for waves to move: Transverse (up and down) These are like ocean waves or waves when you throw a rock in a pond.

Types of Waves How do waves move? 3 ways for waves to move: Transverse (side to side) These waves are seen in how snakes move and in some kinds of earthquakes.

Types of Waves How do waves move? 3 ways for waves to move: Longitudinal (stretch and shrink) These waves are in sound and explosions.

Vocabulary Transverse wave Longitudinal wave Waves that move side to side or up and down. Waves that shrink and stretch. Move back and forth. A spot on a wave that never moves. Node

Exit Question How does sound impact your life?