| A | B |
|---|
| Give 3 examples of media | solid, liquid, and gas |
| 2 things waves can travel through | matter and space |
| what does a wave carry? | energy |
| What kind of waves require a medium? | mechanical waves |
| What kind of waves do NOT require a medium? | electromagnetic waves |
| waves produced by combining longitudinal and transverse waves. | surface waves |
| What is amplitude? | height of the wave from rest position |
| What is frequency? | number of waves produced in a given amount of time. |
| How do we calculate wave speed? | wave speed = wavelength X frequency |
| What kind of wave is a sound wave? | mechanical and longitudinal |
| How does sound travel? | by vibration |
| In what direction do sound waves travel? | all directions |
| Define a medium? | An object through which a wave travels (solid, liquid,gas) |
| What are the 3 sections of the ear? | outer,middle, inner |
| the 3 bones in the middle ear | hammer, anvil, stirrup |
| Ear part that transmits sound to the brain | cochlea |
| 3 kinds of instruments. | strings, winds, percussion |
| What is pitch? | How high or low a sound seems to be |
| Sounds having a frequency too high to hear | ultrasonic |
| How are pitch and frequency related? | high pitch=high frequency and vice versa |
| What is used to change a longitudinal sound wave into a transverse wave? | oscilloscope |
| What is an echo? | reflected sound wave |
| What is an electronic echo called? | radar |
| the process of using sound to locate an object? | echolocation |
| 2 kinds of standing waves | fundamental and resonant frequencies |
| Define sound quality | blending of pitches through interference |
| Define noise | random mix of frequencies |
| What is an electromagnetic wave? | a wave made up of electric and magnetic fields that vibrate - no medium required |
| Define radiation | transfer of energy by electromagnetic waves |
| What is the electromagnetic spectrum | all the frequencies or wavelengths of electromagnetic radiation; divided based on wavelength |
| What is refraction? | Bending of a wave as it changes medium. |
| Define diffraction | Bending of light around corners or through a hole. |
| 3 things light can do | reflect, absorb, transmit |
| 3 kinds of objects how they relate to light. | opaque, transparent, translucent |
| 3 primary colors of light | red, blue, green |
| the 3 primary colors of light combined in equal amounts. | white light |
| 3 primary pigment colors. | cyan, magenta, yellow |
| what is a plane mirror? | flat mirror |
| Which type of lens magnifies? | convex |
| Which type of lens makes images appear fine and crisp? | concave |
| 2 most common vision problems | nearsightedness and farsightedness |
| What are the properties of a magnet? | material that attracts ferromagnetic material |
| opposite ends of a magnet called? | poles |
| What is a magnetic force? | the push or the pull exerted by a magnet. |
| the relationship between north and south poles on a magnet. | like poles repel, opposite poles attract |
| Example of a magnetic light show? | Aurora Borealis - Northern Lights |
| What is generated when charges flow through a wire? | electric current |
| Unit expressing the amount of a charge flowing through awire? | ampheres |
| What does an electric current produce? | a magnetic field |
| What can electrical current flow through? | a circuit |
| Define an electric circuit? | the closed path through which charges can flow |
| 3 components of a circuit? | energy source, wires, load |
| What is resistence? | the opposition to the flow of a charge. |
| Object used to help control resistence? | resistor |
| What is a galvanometer? | a device, run by an electromagnet that detects current. |
| How does an electric motor function? | changes electrical energy into mechanical energy. |
| Define loudness? | how well a sound can be heard measured in decibels. |
