Chapter 5 - Sound Energy

Question 1

Longitudinal wave

Answer 1

Sound Energy - particles move back and forth in the same direction its traveling.

Question 2

Reflection of sound

Answer 2

When it hits hard surface, its kinetic energy reflects and creates echoes.

Question 3

Absorption of sound

Answer 3

When hits a soft surface, kinetic energy is absorbed into heat, due to friction.

Question 4

Diffusion of sound

Answer 4

When hits a rough surface, the energy is diffused, or muffled in many directions.

Question 5

Sound travels through matter

Answer 5

Sound travels fastest in solids, and slowest in gasses.

Question 6

Pitch

Answer 6

Pitch is determined by how quickly particles vibrate in a sound wave.

Question 7

Frequency

Answer 7

The number of waves that pass per second. The higher the frequency, the higher the pitch.

Question 8

Loudness

Answer 8

• loudness depends on the amount of kinetic energy in the particles.
• measured in decibels
• loudness on a graph is desplayed as amplitude.

Question 9

conduction

Answer 9

transfer of energy between adjacent molecules

Question 10

convection

Answer 10

movement of a hot fluid

Question 11

radiation

Answer 11

emission of electromagnetic rays