biodiversity how scientists classify animals.pdf

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  • created by Jeri Faber

    How Scientists Classify Animals

  • Some scientists think there are 30 million different species or kinds of animals on Earth. Scientists sort or classify animals into groups by their characteristics.

    created by Jeri Faber

  • Its not an easy job, but scientists from all over the world try to search for new animal species every day.

    created by Jeri Faber

    Take a look a

    t

    these newly

    discovered

    deep sea

    creatures!

  • To classify different type of animals into groups, scientist take a look at how they are alike and different.

    created by Jeri Faber

    Classification

    piglet

  • Scientists classify animals that do not have backbones into a group called invertebrates. There are 10 groups of invertebrates:

    created by Jeri Faber

    invertebrates

    protozoa

    flatworms

    mollusks

    Annelid worms

    Coelenterates (jellyfish and sea anenome)

    Echinoderms (starfish)

    Arachnids (spiders and scorpions)

    Crustaceans (Crabs and lobsters)

    insects

    Myriapods (starfish)

  • Scientists classify some invertebrate together that have 6 legs. Sometimes they have wings. They do not have a backbone.

    created by Jeri Faber

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    dragonfly

    Monarch butterfly

  • Red ant

    katydid

    bumblebee

    All of these animals have antennae. What is the name for this group of animals?

    created by Jeri Faber

  • If you guessed insects, you are right! Insects are the largest group of animals on Earth. There are so many species of insects that scientists are yet to discover them all.

    created by Jeri Faber

    Someday yo

    u can be a

    biologist a

    nd help wit

    h

    the discove

    ry!

  • Scientific Checklist:

    no backbone

    6 legs

    have antennae

    created by Jeri Faber

  • Scientists classify animals that have backbones into a group called vertebrates. There are 5 groups of vertebrates:

    created by Jeri Faber

    vertebrates

    birds

    fish reptiles

    mammals

    amphibians

  • One group of animals share some common characteristics. They have fur or hair on their bodies. They are warm-blooded.

    Polar bear

    gorilla

    daschund

  • They give live birth to their young. The babies drink milk from their mothers. Can you guess what animal group this is?

    created by Jeri Faber

    Sea otters

    deer deer

    Sea otters

  • Then you were right! Humans are mammals, too!

    created by Jeri Faber

    Did you think

    these were

  • Scientific Checklist:

    Have fur or hair

    Warm-blooded

    Give birth to live young

    Babies drink their mothers milk

    created by Jeri Faber

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    Scientists group other animals together since they have feathers and wings.

    created by Jeri Faber

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    hummingbird

    grosbeak

  • created by Jeri Faber

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    They have beaks.

    ...and lay eggs. seagull

  • created by Jeri Faber

    But murres lay their eggs right on a rocky ledge.

    You probably already know what name scientists call this group. What is it?

    robin eggs

  • Scientific Checklist:

    Have feathers and wings.

    Have beaks.

    Babies hatch from eggs.

    Warm-blooded

    created by Jeri Faber

  • Scientists group other animals together that have scales and swim in the water.

    lionfish lionfish

    grouper

    shark

    Even sharks are in this group. They are all called

    created by Jeri Faber

  • Scientific Checklist:

    Have scales and fins

    Cold-blooded

    Use gills to breathe underwater

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  • People often have trouble distinguishing between the next two groups of animalsamphibians and reptiles.

    Both reptiles and amphibians are cold-blooded and lay eggs.

    Sea turtle

    created by Jeri Faber

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    But reptiles have scales and dry skin.

    created by Jeri Faber

  • Here are some reptiles. See how dry and scaly their skin is?

    alligator

    snake

    Anole lizard

    tortoise

    created by Jeri Faber

  • Scientific Checklist:

    Have scales

    cold-blooded

    Young hatch from eggs

    created by Jeri Faber

  • Amphibians live on land and in the water. Amphibians usually have moist skin.

    Photo taken by Jeri Faber

  • Scientific Checklist:

    Moist skin

    Cold-blooded

    Babies hatch from eggs

    Live on land and water

    created by Jeri Faber

  • Ill give you 5 animals to classify. Youll need to list at least 2 reasons why you sorted the way you did. The answer for each is on the slide following.

    Ready? created by Jeri Faber

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    created by Jeri Faber

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    This adorable baby chipmunk will drink milk from its mother.

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    I hope these wings will help it fly from the nest soon since it looks a little crowded!

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    created by Jeri Faber

  • Amphibians lay eggs. Did you know it takes two years for bullfrog tadpoles to develop into frogs?

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    Amphibians have moist skin!

  • created by Jeri Faber

  • Clownfish use gills to breathe.

    You probably noticed all of these scales on its skin. Take a look at the fins, too.

  • Photo taken by Jeri Faber

  • Photo taken by Jeri Faber

    Reptiles hatch from eggs.

    Reptiles have dry scaly skin!

  • I can tell you have wha

    t

    it takes to be a great

    biologist!

    created by Jeri Faber

  • Lets Review!

    How do scientists classify animals?

    What are the 5 classifications of animals with a backbone?

    What is the largest group of animals on Earth?

    What type of animal are you?

    Why do you think scientists classify animals?

    created by Jeri Faber

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