Not all spiders make webs. Some are hunters. Some spiders dig homes under the ground. Some spiders can live most of their lives under water in bubble webs. Some spiders have claws at the end of each leg.
Spiders live in all sorts of environments.
Scorpions and spiders are predators of other insects. Not all scorpions, and very few spiders, are dangerous to man. There are far more species of ticks and mites than other orders of arachnids.