Unit 3 lesson 4- Sound and Hearing
- True or False: Sound can travel faster through air than it can through water or metal. False. Sound can travel approximately 331 m/s through air; 1,509 m/s through fresh water; and 5,000 m/s depending on the type of metal it is traveling through.
- True or False: Loudness is a subjective measurement, meaning it varies depending on who is hearing the sound. This is true. Loudness varies depending on the individual. Intensity, however, is the power of sound per unit area or the wave's energy in a unit area. This is not subjective, and it is measured in decibels.
- True or False: High frequency sounds have a higher pitch, and low frequency sounds have a lower pitch. This is true. Although pitch can be subjective, it depends on frequency. If something has a high frequency, meaning something is vibrating quickly, it will have a higher pitch or sound like a higher note than something that is vibrating more slowly and has a lower pitch.
Unit 4 Lesson 3- Changes and Division in Britain and France
- What changes were made in Britain to make Parliament fairer?
Possible Response: More men were given the right to vote, which gave cities more representation. - What did the Second and Third Reform Acts do to improve British democracy?
Possible Response: They gave most working men and farmers the right to vote.
