The variables are:

Species The species of the dinosaur specimen

Clade The clade of the dinosaur species: ornithopod, sauropod, or theropod

Period The geologic period of the specimen: Triassic, Jurassic, or Cretaceous

Mass (kg) An estimate of the specimen's mass in kilograms

1.What types of variables are Clade, Period, and Mass (kg)? Briefly justify your answers -

your mark for each variable is allocated based on the justification, not simply identifying the

variable type.