Unit 7 review

Question 1

Resonance

Answer 1

The prolonging of a sound by the reflection of a surface

Question 2

Sound waves

Answer 2

A wave of compression and rarefraction

Question 3

Frequency/pitch

Answer 3

The number of waves that pass a fixed point in a certain amount of time

Question 4

Amplitude/volume

Answer 4

The distance between the resting point of the wave and the crest of trough

Question 5

Ultrasound

Answer 5

Sound waves reflect off the organs or tissues and produce electric signals and a computer converts them to a video image

Question 6

Sonar

Answer 6

Uses sound waves to estimate size, shape, and depth of underwater objects

Question 7

Electromagnetic spectrum

Answer 7

Arranged by wavelength and frequency

Question 8

Focus on visible light

Answer 8

Radiant energy, colors visible light

Question 9

Reflection

Answer 9

When light bounces off a surface

Question 10

Refraction

Answer 10

Light bends

Question 11

Diffraction

Answer 11

Light waves hit an obstacle and scatter

Question 12

Mirrors vs. lenses

Answer 12

Mirrors reflect light
Lenses refract light

Question 13

Convex mirrors

Answer 13

Produce a small upright image
Ex. Car side mirror

Question 14

Concave mirrors

Answer 14

Converge light
Magnified image

Question 15

Convex lenses

Answer 15

Converge light
Ex. Magnifying glass

Question 16

Concave lenses

Answer 16

Diverge light
Ex. Glasses for nearsightedness

Question 17

Transmission

Answer 17

Light goes right through another object

Question 18

Absorption

Answer 18

Light goes into an object

Question 19

Scattering

Answer 19

Light hits an object and goes in all directions

Question 20

Do not need a medium

Answer 20

Electromagnetic waves

Question 21

Need a medium

Answer 21

Mechanical waves

Question 22

Transverse

Answer 22

Particles move perpendicularly to the wave

Question 23

Compressional

Answer 23

Particles vibrate parallel to the wave