Logarithmic Scales – Additional Problems Answer Key

Richter Scale

1. a) 6 or 7 times as frequent      b)36 – 49 times as frequent         c) 216 – 343 times as frequent

2. An earthquake with magnitude 6.5 is 1.26 times as intense as an An earthquake with magnitude 6.4

Decibel Scale

1. a) A snore is 8 x as loud as normal conversation

b) A normal conversation is 1000 x as loud as a whisper

2. a) Maximum Volume is 63096 x as loud as the recommended setting

b) 75% of maximum setting is 63 x louder than 60% of maximum setting

pH Scale

1. a) Lemon Juice is 100x as acidic as Tomato Juice

b) Lemon Juice is 100000x as acidic as pure water

c) Pure Water is 100x as acidic as Baking Soda

d) Baking Soda is 10000 x as acidic as Oven Cleaner

2. The stream became 10 x as acidic