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Scientific Notation Worksheet ANSWERS

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            If you want to know more about the astronomical events listed in the timelines go to http://www.pbs.org/deepspace/timeline/index.html

 

Please note the timelines are not continuous.  The time reference for each timeline is listed at the top of the image.  The current estimates of the age of the universe range from 13 billion to 15 billion years.

 

Study the ŇTime After the Big BangÓ timeline. How long after the Big Bang did each of the events occur? List your answer as a decimal, and in scientific notation. DonŐt forget to include units!

 

Name of Event

Elapsed time written as a Decimal

Elapsed time written in Scientific Notation

Stars and Galaxies Form

 

 

300,000,000 years

3 x 108 years

Matter Domination Era

 

 

300,000 years

3 x 105 years

Radiation Era

 

 

10,000 years

1 x 104 years

Basic Elements Form

 

 

3 seconds

3 x 100 seconds

Universe Shaped

 

 

.000001 seconds

1 x 10-6 seconds

Big Bang

 

 

.00000000000000000

000000000000000001

Seconds (34 zeroes)

1 x 10-35 seconds

 

 

 

 

 

 

 

 

 

Event

Time written as a Decimal

Time Written in Scientific Notation

Supernova 1987A Explodes

170,000 years

1.7 x 105 years

Homo Sapiens Evolve

 

600,000 years

6 x 105 years

Dinosaurs are Extinct

 

65,000,000 years

6.5 x 107 years

Mammals Evolve

 

200,000,000 years

2 x 108 years

Primitive Animals Appear

 

700,000,000 years

7 x 108 years

Earliest Life Forms

 

3,800,000,000 years

3.8 x 109 years

Birth of our Sun

 

5,000,000,000 years

5 x 109 years