They are interconnected
Arctic
Lithium, sodium, potassium, rubidium and cesium are collectively known as the alkali metals.
The big body of salt water covering three-fourths of the Earth's surface is known as the ocean. It is divided into five major oceans: the Pacific, Atlantic, Indian, Southern, and Arctic Oceans. The oceans play a crucial role in regulating the planet's climate, supporting marine life, and facilitating global trade. They are essential to the Earth's ecosystem and human livelihoods.
That would be magnetism, and it's not limited to objects made of iron. Many of the strongest magnets known come from a category of elements known collectively as rare earths.
The chromosomes pairs 1-22 are collectively known as autosomes.
The all the water on Earth's surface is known as the hydrosphere. This includes water in oceans, rivers, lakes, and ice caps.
There are seven colors in the rainbow. They are collectively known as ROY G BIV, which is shortened for the color names.
Horses
Confederate.
The Union
Pentavalent atoms are collectively known as prictogens.Trivalent atoms are collectively known after their simplest member, boron.
How are Britt,Lee,O'Reilly,Vin,Chris,Harry and Chico collectively known in the title of a film