| A | B |
|---|
| What is a wave? | periodic back-and-forth motion that transmits energy |
| What are the two major types of waves? | Transverse waves move back and forth; Longitudinal waves oscillate in the same direction |
| What is pitch? | The effect of frequency on the way the ear perceives sound |
| What is the sound heard distinctlyh after being reflected from an object? | Echo |
| What does the acronym SONAR stand for? | Sound Navigation and Ranging |
| What color can be thought of as a mixture of all the colors of light? | white |
| What color can be actually be thought of as an absence of all color? | black |
| What are the two basic shapes of lenses? | Convex -bulges outward (magnifies) Concave-hollowed inward (appear distant) |
| What is a three-dimensional image produced by a laser light? | hologram |
| What is the speed of light in a vacumm in km/s? | 300,000 km/s |
| What is electrostatics? | The study of the nature, behavior, and uses of static electricity |
| What are the two types of electric charges? | Positive and negative |
| What method of charge transfer produces electric charges at a distance? | Induction |
| What doughnut-shaped belts of charged particles exist in the earth's magnetosphere? | Van Allen radiation belts |
| What is an electromagnet? | a device that produces a strong magnetic field when electricity passes through it |
