SymmetrySymmetry

A PowerPoint Presentation created by Ms. A PowerPoint Presentation created by Ms. Rollins using Rollins using the collection of web pages the collection of web pages

created by the Adrian Bruce and his students created by the Adrian Bruce and his students http://http://

www.adrianbruce.com/Symmetry/index.htmlwww.adrianbruce.com/Symmetry/index.html

Bilateral SymmetryBilateral Symmetry Shape has bilateral symmetry (line Shape has bilateral symmetry (line

symmetry) when one half of it is the symmetry) when one half of it is the mirror image of the other half.mirror image of the other half.

Symmetry exists all around us and Symmetry exists all around us and many see it as being a thing of beauty.many see it as being a thing of beauty.

Human Symmetry Human Symmetry

The 'Proportions of The 'Proportions of Man' is a famous Man' is a famous

work of art by work of art by Leonardo da Vinci Leonardo da Vinci

that shows the that shows the symmetry of the symmetry of the human form.human form.

Is a butterfly Is a butterfly symmetrical?symmetrical?

Animals that have Animals that have Bilateral SymmetryBilateral Symmetry

Use pictures that you take or that are Use pictures that you take or that are public domain to avoid copyright issuespublic domain to avoid copyright issues

At the  beach At the  beach … there are … there are a variety of shells with a variety of shells with Bilateral Symmetry.Bilateral Symmetry.

Which of the following has Which of the following has Radial Symmetry Radial Symmetry

(Rotational Symmetry)?(Rotational Symmetry)?

Under the seaUnder the sea … there are … there are also many symmetrical also many symmetrical

objects such as these crabsobjects such as these crabs

and this starfish.and this starfish.

Oysters have what type of Oysters have what type of Symmetry?Symmetry?

To start your exploration, use To start your exploration, use the green the green Building Your Life Building Your Life Science VocabularyScience Vocabulary books to books to

take each of these words take each of these words apart :apart :

BiBilateral lateral SymSymmetrymetry RadiaRadial l SymSymmetrymetry AAsymsymmetrimetrical cal SymSymmetrymetry

Then, use your textbook, Then, use your textbook, pages 315 – 317, and a pages 315 – 317, and a dictionary to create a dictionary to create a

working definition (7 words working definition (7 words or less).or less).

Next step: Apply the new Next step: Apply the new informationinformation

Work with your groups to analyze Work with your groups to analyze the specimens for symmetrythe specimens for symmetry

Report your findings in the class Report your findings in the class spreadsheetspreadsheet

The same specimens will be The same specimens will be examined for characteristics that examined for characteristics that identify that organism with a identify that organism with a specific classification level and specific classification level and scientific name later scientific name later

Finally, evaluate what type of Finally, evaluate what type of symmetry this rare crab has symmetry this rare crab has

based on your working based on your working definitions of bilateral, radial, definitions of bilateral, radial, and asymmetrical symmetry.and asymmetrical symmetry.