What A Stretch!
This children's toy originally was made from steel wiring.
A Slinky.
Famous for being the origin of a Greek letter, name this body of water.
Nile River
This period of the French Revolution stands out for its especially ruthless nature.
The Reign of Terror
Name the pattern that is on your common chessboard.
Checkerboard/checkered, grid, or tessellation
Name this language isolate, typically known for their seafaring culture and whaling.
Basque.
Name the physical property for a given item to return to its previous shape.
Elasticity/Compliance
This type of biome is around ~1/3rd of all land on the Earth, but best known for being in the Central USA, Eastern Europe, and the African Savanna
Plains/Flatland/Prairie (any other synonym works here!)
This is the earlier of the two Russian revolutions in 1917.
February Revolution
Name the most common type of symmetry seen in kingdom Animalia.
Bilateral Symmetry.
Name this leader of the resistance against Julius' Caesar's conquests of Gaul.
Ambiorix.
Name the SI unit for the modulus of the elasticity of a given material.
Pascals.
Name the country with the longest land border with France.
Brazil (because of French Guiana)
This important revolutionary was murderer by the Freikorps for her role in the failed German Revolution of 1918.
Rosa Luxemburg.
Name the famous Chinese game comprised of the rearranging of 7 specific tiles.
Tangrams.
This was the last territorial acquisition in the contiguous United States, defining a certain border in the Western USA.
Gadsden Purchase
This is the primary chemical constituent of natural rubber.
Polyisoprene
This line is a boundary within Indonesia; north of the line, flora, fauna, and ecosystems are primarily Asiatic; south of the line, they are primary Polynesian.
Wallace Line
Name this Anarchist Coalition had played the most pivotal role in the 1936 Catalonian and Aragonese uprising.
CNT-FAI
Name the 2 of the 3 types of symmetry fractals have.
Reflectional Symmetry, Rotational Symmetry, and Self-Similarity.
Name the most common organic stereogenic element from which chirality in molecules occurs.
Carbon.
Name the simplified name for the constant factor characteristic in Hooke's Law.
Stiffness.
This soil is typically referred to as one of the most fertile soils in the world, most abundant in Ukraine and the Great Plains.
Chernozem/Black Soil
Name this victim of the Great Purge, referred to as the famed "Red Napoleon" of the Russian Civil War.
Note: You need only say their last name for credit.
Mikhail Nikolayevich Tukhachevsky
Name this shape from Conway's Game of Life
https://drive.google.com/file/d/1gyvCsAuAx2e-YONbhhNU6Jm7wTxd0xTh/view?usp=sharing
Pulsar
Name the principle used for the organization of any Communist Party according to the notion that majouritarian democracy and complete dependence on the center (i.e. autocracy/autocratic councils) is impossible to correctly use as a basis for structure within the Communist Party.
Organic Centralism (you didn't expect this question to not be about communism, right?)