Transcript Classification

Classification
Grouping & Identifying
Living Things
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Think of three examples where we
group things.
1. Grocery store
2. Clothes in our drawers
3. Cabinets in our kitchen
Why do we group these things?
To make life easier.
Why do we classify?
The grouping or sorting of things
based on something (trait) that they
have in common
Makes life or the studying of life
easier
Used by all people, but especially by
scientists when they want to learn
about a group.
How do scientists classify?
Scientists classify to make things
easier to study
They split all things (matter) into two
groups-----living and non-living
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What do all living things have in
common?
Grow and change
Movement
Need for food, water, and air (use
energy)
Reproduce (make more)
Respond to environment
Adapt (deal with) to their
environment
Made up of cells
Classifying Living Things
We put all livings things into two
large groups:
Animals
Plants
Animals
Animals are spilt into two major
groups:
Vertebrates
Invertebrates
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Vertebrates
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These are animals with a backbone.
There are five groups of vertebrates:
Amphibians
Birds
Fish
Mammals
Reptiles
Warm Vs. Cold
All animals are either warm or cold
blooded
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Warm blooded- keeping a constant
body temperature and adapting (doing
something to deal with) the outside
temperature Ex: shed, put on a coatmammals and birds
Cold blooded- move from place to
place to change or adjust body
temperature- fish, reptiles, amphibians
Birds
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Have feathers,
wings and hollow
bones
Lay hard shelled
eggs
Warm blooded
Breathes with
lungs
Mammals
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Have hair and
produce milk
Most are born alive
and can not take
care of themselves
Warm blooded
Breathes with lungs
3 Kinds of Mammals
1. Monotremes- mammals that lay
eggs- Ex: platypus
2. Marsupial- give birth to undeveloped
babies that continue to develop in a
pouch- Ex: kangaroo
3. Placental- develops inside its
mother’s body until its body systems
can function on their own- Ex:
humans
Reptiles
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Have dry scales
Lay leathery
shelled eggs
Cold blooded
Breathe with lungs
Fish
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Have wet scales
Lays eggs in
water
Lives in waterbreathe air
through gills
 Cold-blooded
Amphibians (double-life)
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 Have moist skin
 Lay jelly coated
eggs in water
 Lives on land and
water
 Cold-blooded
 Go through a
metamorphosis ( a
complete change)
 Breathe with lungs
Summary of Vertebrates
Invertebrates
 These are animals without a backbone or
brain.
Arthropods
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Have lots of jointed legs (appendages)
Segmented (or sectioned) bodies
Have an exoskeleton that must be shed
(molt) because it doesn’t grow with the
animal
They have top/bottom symmetry
There are four groups of arthropods:
 Arachnids
Centipedes & Millipedes
Crustaceans
Insects
Arthropods – Arachnid
http://www.brainpop.com/science/diversityoflife/arachnids/
Have four pairs of
legs (8 total)
Have bodies
divided into two
sections- abdomen
(body) and the
head
Ex: spiders, ticks,
scorpions
Arthropods – Centipedes
&Millipedes
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Have long thin
bodies made up of
sections
Have many legscentipedes have
one pair per
section/millipedes
have 2 pairs per
body section
Arthropods – Crustacean
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Have five-seven
pairs of legs
First pair often
used as pincers
Bodies covered
in shellexoskeleton
crabs, lobster,
shrimp
Arthropods – Insects
http://www.brainpop.com/science/diversityoflife/insects/
Have three pairs of legs
Bodies divided into three
sections (head, thorax,
abdomen)
Often have wings
Go through a
metamorphosis (a change)
complete/incomplete
Ex:butterflies, grasshoppers
Mollusks
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 Crawl on a single
fleshy pad.
 Can have a shell
 Ex: slugs, snails,
squid
Annelids
Have round worm
like bodies
Have bodies
divided into
segments
Ex: worms,
leeches
Cnidarians
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Have thin sack
like bodies
Have tentacles
Ex: jellyfish, sea
anemone
Echinoderms
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Have bodies divided
into five parts
Have spiny outer
covering
Ex: starfish
Sponges
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Have bodies
made of loosely
joined cells