Recognise useful shared features and distinguish major animal and plant groups.
Method and worked examples
Classification groups living things by shared features. A vertebrate has a backbone; an invertebrate lacks one. Mammals have hair at some stage and feed young with milk. Birds have feathers. Adult insects have six legs and three main body sections. Flowering plants produce flowers and seeds enclosed within fruit.
Use structural features rather than habitat, colour or size alone. A whale is a mammal despite living in water, and a bat is a mammal despite flying. Not every flying animal is a bird. Compare several supplied traits when identifying an organism: one incomplete observation can mislead. A classification rule should describe an observable feature that can be applied consistently.
Example 1
An aquatic animal breathes air and feeds its young milk. Which group best fits?
Mammal. Milk production is a useful distinguishing feature; an aquatic habitat does not make it a fish.
Example 2
A small animal has six legs and three main body sections. Which group fits?
Insect. The stated body structure matches an adult insect.
Watch out:Habitat is not enough for classification. Whales are mammals, while many aquatic animals are invertebrates.
Features and classification groups | Year 7 Science | Ascent Arcade