No, spiders are neither reptiles nor amphibians. Spiders belong to the class Arachnida, which also includes scorpions, ticks, and mites. They are invertebrates, meaning they do not have a backbone.
Reptiles, such as snakes and lizards, are part of the class Reptilia and are characterized by their scaly skin and ability to lay eggs on land. Amphibians, like frogs and salamanders, are part of the class Amphibia and typically have a life cycle that includes both aquatic and terrestrial stages.
Spiders have a distinct body structure with two main body segments: the cephalothorax (which houses the eyes, mouth, and legs) and the abdomen. They also have eight legs, unlike the four legs found in reptiles and amphibians. Furthermore, spiders do not undergo metamorphosis, which is a key process in the life cycles of many amphibians.
In summary, spiders are unique creatures that fall within their own category, separate from reptiles and amphibians.