1. Spider Shapes Steve Case NSF North Mississippi GK-8 University of Mississippi March 2007

2. NSF North Mississippi GK-8 Spiders Members of the arachnid family along with ticks, mites, and scorpions Two main body segments: head and abdomen Silk glands in abdomen; used by many types of spiders to spin webs

3. NSF North Mississippi GK-8 Spiders’ Webs Webs spun between branches of trees, bushes, or other objects Used to catch flies and other insects Portions of web non-sticky so spider does not get trapped Five major types of web; most common type of web spun by orb weaver spiders Web silk stronger than steel

4. NSF North Mississippi GK-8 What shapes can we find in a spider’s web?

5. NSF North Mississippi GK-8 Circle How many sides? –One How many corners? –Zero Can we find circles in a spider’s web?

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7. Quadrilateral How many sides? –Four How many corners? –Four Different types of quadrilaterals: –Parallelogram, rectangle, rhombus square, trapezoid Can we find quadrilaterals in a spider’s web?

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9. Parallelogram How many sides? –Four How many corners? –Four Is it a quadrilateral? –Yes What makes a parallelogram? –Opposite sides of a parallelogram are parallel. Different types of parallelograms: –Square, rhombus, rectangle

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11. Rectangle How many sides and corners? –Four Is it a quadrilateral? –Yes Is it a parallelogram? –Yes What makes a rectangle? –All corners of a rectangle form right angles.

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13. Rhombus How many sides and corners? –Four Is it a quadrilateral? –Yes Is it a parallelogram? –Yes What makes a rhombus? –All four sides of a rhombus are equal in length.

14. NSF North Mississippi GK-8 Square How many sides and corners? –Four Is it a quadrilateral? –Yes Is it a parallelogram? –Yes Is it a rectangle? –Yes Is it a rhombus: –Yes What makes a square? –All sides of a square are equal in length.

15. NSF North Mississippi GK-8 Trapezoid How many sides and corners? –Four Is it a quadrilateral? –Yes Is it a parallelogram? –No What makes a trapezoid? –Only two sides of a trapezoid are parallel.

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17. Triangle How many sides and corners? –Three Can we find triangles in spiders’ webs?

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19. Hexagon How many sides and corners? –Six Do any insects or arachnids build hexagons?

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21. Hexagon Triangle Trapezoid Square Rhombus Parallelogram Circle Rectangle Let’s Review

22. NSF North Mississippi GK-8 Image Sources “Web Photos.” August 2005. Spiders. Accessed March 15, 2007..