Science Final 8th Grade

A machine made of more than one simple machine. Examples include

• Duel Machines

  Lever, Wedge

• Compound Machine

  pencil, fork

• Compound Machine

  Scissors and Bicycles

• Duel Machines, Scissors and Bikes

Type of mechanical wave in which matter in the medium moves forward and backward in the direction of the wave 

• Compression Waves

• Parallel Waves

• Compound Waves

• Refraction

Rhythmic disturbance that carries energy but not matter 

• Sound

• Light

• Waves

• Amplitudes

Material through which a wave travels

• Substance

• Conductor

• Medium

• Insulator

Amount of energy a wave contains 

• Refraction

• Frequency

• Compression

• Amplitude

The relationship between frequency and pitch

• Frequency is twice the amount of pitch

• High Pitch= High Frequency and Low Pitch= Low Frequency

• High Pitch = Low Frequency and Low Pitch = High Frequency

• No Relationship

Bending of a wave as it moves from one medium to another 

• Diffraction

• Frequency

• Refraction

• Amplitude

Examples of Mechanical Waves

• Tidal, Ocean, Sound

• Magnetic

• Radio, Visible Light

• Microwaves, X-Rays

Examples of Electromagnet Waves

• Radio, Visible Light, X Ray, Mircowave

• Tidal, Ocean

• Sound

• compressional

Number of wavelengths that pass a given point in one second; measured in hertz 

• Medium

• Pitch

• Frequency

• Diffraction