PROJECT: LOGARITHMIC SCALE

Name __________

Directions:

PART 1 (Learning logarithmic Scale for distance):

First, think and discuss how you should represent either a distance of only 10 feet or a distance of 100, 000 feet on one sheet of graph paper.  And then, think and discuss how you should represent the distance from the earth to the moon? Is it possible? If you are confused, see the Process page.

Second, find the size of the tallest human and the tallest tree, the height of the tallest building and the highest mountain, and the distance from the Earth to the Moon and the distance from the Earth to the Sun. Record your findings. You may use the template.

Third, use the logarithmic Scale for distance to represent the above objects. Record your findings.

Fourth, create a bar graph with your findings on one sheet of graph paper.  Is it possible? 

Objects:  Tallest human, Tallest tree, Tallest building, Highest mountain, Earth to moon, Earth to sun

OBJECTS	IN FEET	LOG SCALE
Tallest human
Tallest tree
Tallest building
Highest mountain
Earth to moon
Earth to sun

PART 2 (dB Scale):

First, find the intensity of a sound and decibel level of the intensity of the following: whisper, soft recorded music, loud recorded stereo music, subway train, airplane at takeoff.

OBJECTS	INTENSITY	dB LEVEL
whisper
soft recorded music
loud recorded stereo music
subway train
airplane at takeoff

Second, explain the following: a) What is dB scale and b) how did you find the dB level from the intensity of a sound?

PART 3 (pH Scale):

First, find the acidity of the following: head shampoo, water, milk, beer, lemons, human blood.

OBJECTS	pH
head shampoo
water
milk
beer
lemons
human blood

Second, explain the following:

a) How does the acidity of Head shampoo compare with the acidity of pure water?

b) How does the acidity of beer compare with the acidity of milk?

c) How does the acidity of lemons compare with the acidity of human blood?

d) Who invented pH scale and what is it?

PART 4:

Find more Logarithmic scales that exist in this world and explain about them.

PART 5: (CONCULUSION)

Write your results from task PARTS 1-4 and explain your findings in detail. In your essay, you should include your following: What is a Logarithmic Scale? When and how do we use them? Who initially benefits from knowing them?