Substances that are made up of only one type of atom.
Answer:
open cluster
Explanation:
As the name suggests, an open cluster is a star cluster that is loose and disorganized.
Movement. All living things move in some way. ...
Respiration. Respiration is a chemical reaction that happens within cells to release energy from food. ...
Sensitivity. The ability to detect changes in the surrounding environment. ...
Growth. ...
Reproduction. ...
Excretion. ...
Nutrition.
Velocity can vary as long there is specific direction (displacement)
Speed has no direction therefore change in speed is not necessary the velocity...
Velocity is also in a specified direction
