Gravity

The fundamental force of attraction that all objects with mass have for each other

Robert Smithson "Spiral Jetty"

Andy Goldsworthy "Ephemeral"

Andy Goldsworthy "Rivers and Tides"

Tom Shannon "Anti-gravity sculpture"

Alexander Calder "Untilted (Mobile)"

Weight

the amount or quantity of heaviness

Louis Bourgois "Spider"

Otterness "Shot Dog Piece"

'

Robert Morris "Untitled"

Giacometti "the nose"

Emily Floyd "Public Art Strategy"

Mass

a body of coherent matter, usually of indefinite shape andoften of considerable size

Michael Lewis "the End"

 Aqa Wynwood Notables "Robot, Lobsters, Golden Poo"

Leonardo Drew "Untitled"

Alexander Caldwell "Untitled"

Tokyo Kamen "Untitled"

Play/ Invent

Play would be an act put into motion, and where one is inspired to play or participate in a manner of reflecting a determination to win or succeed. In inventing, one is inspired and through this idea they originate or create a product of the ingenuity.

David Brewster, the kaleidoscope

Richard Drew, Scotch tape

Leon Battista Alberti, the anemometer

Spencer Silver, Post-it-Notes

Willis Carrier, the air conditioning 

Closed Form

These are objects of which contain solid volumes that are isolated from ambient space

Mark Di Suvero "Yoga"

Lynn Chadwick "Conjunction"

 Donald Judd  "Untitled 1963"

Henry Moore "Bronze Form"

 Michelangelo "David"

Form

The shape of any object

Freestanding/In the round

This type of sculpture can be viewed from any angle and where space occupies every angle.

Emily Floyd "Organarchy"

Tom Otterness "Immigrant Family"

Tom  Otterness on Broadway "Gabriel BenAtez"

Louis Bourgois "Maman"

Magdalena Abakanowicz "Warszawa Rzezba"