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THE CLASSIFICATION SYSTEM. WHY do scientists classify living things?. Answer: Classifying living things makes it easier to find and share information about them. HOW do scientists classify living things?. Answer: All living things can be classified into - PowerPoint PPT Presentation
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THE CLASSIFICATION
SYSTEM
WHY do scientists classify living things?
Answer: Classifying living things makes iteasier to find and share informationabout them.
HOW do scientists classify living things?
Answer: All living things can be classified intoone of five kingdoms. A kingdom is the largest group into which living things can be classified.
Every member of a kingdom has some characteristics that are the same as those of other members.
THE CLASSIFICATION SYSTEMThe Five Kingdoms
Fungi MoneransProtistsAnimals Plants
Description:
Most many-celled, absorb
food fromother living
things or deadthings such
as logs
Description:
Most one-celled, make
their ownfood or feedon living oronce living
things
Description:
One-celled,no cell nuclei,some maketheir own
food, somefeed on livingor once-living
things
Description:
Many-celled,make theirown food
Description:
Many-celled,feed on livingor once living
things
Examples:
Bacteria
Examples:
Monkeys,birds, frogs,fish, spiders
Examples:
Mushrooms,yeasts,molds
Examples:
Trees,flowers,grasses,
ferns,mosses
Examples:
Algae,amoebas,diatoms
Scientists divide the animal kingdom into
two large groups.ANIMAL KINGDOM
Vertebrates
Animalswith
a backbone
Invertebrates
Animalswithout
a backbone
Amphibians BirdsFishMammals Reptiles
Description:
Have moistskin and noscales, mostbegin life inwater, butlive on land
as adults
Description:
Live theirentire livesin water,
most havehard scales
covering theirbodies and gills to takeoxygen theyneed fromthe water
Description:
Have feathersto keep it warm andhelp some
to fly
Description:
Have dry,scaly skin
Description:
Have hairand produce
milk fortheir young
Examples:
Owls, robins,parrots,penguins
Examples:
Cats, dogs
Examples:
Frogs, toads,newts
Examples:
Lizards,snakes,turtles
Examples:
Sharks, eels,bass, tuna
VERTEBRATES
BirdsFish
Description:
Live theirentire livesin water,
most havehard scales
covering theirbodies and gills to takeoxygen theyneed fromthe water
Description:
Have feathersto keep it warm andhelp some
to fly
Examples:
Owls, robins,parrots,penguins
Examples:
Cats, dogs
Examples:
Frogs, toads,newts
Examples:
Lizards,snakes,turtles
Examples:
Sharks, eels,bass, tuna
MollusksArthropods
Description:
May or maynot have a
hard outer shell
Description:
Have legs withseveral joints,bodies
have two or moreparts, often
have an outercovering thatprotects them
Examples:
Snails, clams,squids
Examples:
Insects such asbeetles,bees,and spiderssuch as mites,horseshoe
crabs, and scorpions
INVERTEBRATES
Worms
Examples:
Earthworms,tapeworms,flatworms
Description:
Have no shells,legs, or eyes
Scientists study the living things in each kingdom to see how they are alike and how they are different.
They use characteristics to make smaller and smaller groups, and they give each smaller
group a name.
The most specific classification groups have only one type of living thing.
Forming Smaller Groups
Classification of a House Cat Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora
Species: domesticus
Family: Felidae Genus: Felis
Most living things have a common name such as house cat. But
common names may be different in different places.
For this reason, scientists name animals with the labels of the two smallest classification groups.
The name of the second smallest group, the genus, is joined with the name of
the smallest group, the species.
The scientific name for a house cat is Felisdomesticus.
Summary
Scientists organize living things to make studying and discussing them easier.
Scientists classify all living things into five kingdoms – animals, plants, fungi, protist, and monerans.
The five kingdoms are divided into smaller groups.
Vertebrates such as mammals, reptiles, amphibians, birds, and fish, have backbones.
Invertebrate animals, such as arthropods, mollusks, and worms, do not have backbones.
