Mr. Markwalter. It’s a log jam… Quiz! 15 minute maximum. All desks clear. Silence until I have all quizzes back in.

LogarithmicFunctions

Mr. Markwalter

LogarithmicFunctions

Mr. Markwalter

It’s a log jam…

Homecoming

Shh. What’s that?

Cute Baby Foxes!

Also

Quiz!

15 minute maximum.All desks clear.Silence until I have all quizzes back in.

Quiz

Today’s Topic

AAAAAplicationsOf logarithms.

In 2001, there was an earthquake in Gujarat India. It measured 7.9 on the Richter scale.

Earthquakes

In 1999, there was an earthquake in Athens, Greece. It measured 5.9 on the Richter scale.

Earthquakes

In 2001, there was an earthquake in Gujarat India. It measured 7.9 on the Richter scale. In 1999, there was an earthquake in Athens, Greece. It measured 5.9 on the Richter scale. How many times more severe was the 2001 earthquake than the one in Athens?

Earthquakes.

a=amplitude in micrometersT= the period (don’t worry about this)B accounts for the weakening of the wave

What is amplitude?

Let’s see how the Richter scale works.

Amplitude measures the severity.Let’s call the amplitude of the Gujarat

earthquake a1 and the Athens earthquake a2.

We want a1/a2

Earthquake!

Let’s start with this…

Earthquaker!

a1/a2=100

The Gujarat earthquake was 100 times more severe.

The difference in Richter number was 2.102=100

Coincidence? Let’ let Bill explain.

Earthquaker!

Bill Nye

Acidity!

The measure of the concentration of hydrogen ions (in moles per liter).

Acidity

Psst. A mole is unit, or have you heard?

pH=-log(H+)

H+ = the hydrogen ion concentration More acidic= higher concentration= lower

pH

Acidity

Some vinegar has a pH of 2.4. Some baking soda has a pH of 8.4

What are the hydrogen ion concentrations? How many times greater is the hydrogen ion

concentration of the vinegar than the baking soda?

Acidity

A pretty strong acid has a pH of 1.8 while a base has a pH of 9.8.

What are the hydrogen ion concentrations? How many times greater is the hydrogen ion

concentration of the acid than the base?

One more test

Option A: I want to start out slow and work my way up.

Option B: I feel pretty comfortable with this and am ready to try more.

15 minutes of practice. 5 minutes of review.

Worksheet

An earthquake in Peru was 10000 times more severe than an Earthquake in China. If the earthquake in China scored 2.5 on the Richter scale, what was the score of the Peru earthquake?

Challenge

Unit 3 Test Corrections Due TODAY

Test Wednesday Also, the

Benchmark Homework

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