Life Science Worksheet 1 Life Science Worksheet GRADE LEVEL: Seventh Topic: Organization of Living Things

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    Life Science Worksheet

    GRADE LEVEL: Seventh

    Topic: Organization of Living Things

    Grade Level Standard: 7-1 Compare and contrast living things.

    Grade Level Benchmark: 1. Compare and classify organisms into major groups on

    the basis of their structure. (III.2.MS.1)

    Learning Activity(s)/Facts/Information

    Central Question: How are groups of living things classified?

    1. “Classification of Animals” 

    2. “Additional Resources” 

     Activity is attached


    Ready Reference Instructional Fair

    Process Skills:

    New Vocabulary: vertebrates/invertebrates, cold/warm blooded, single cell,

    multicellular, flowering/nonflowering, mammals, reptiles, amphibians

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    KINGDOM: ANIMALIA The animal kingdom consists of multicellular organisms that feed by ingestion. On the simplest level, they are made up of tissues. As the animals become more complex, these tissues form organs. At the most complex level, these tissues and organs form organ systems. The following is an overview of a portion of the animal kingdom.





    These sessile animals attach permanently to underwater objects. Characteristics include: ! two cell layers with a

    jellylike substance in between.

    ! a pore-covered body with a skeletal structure for support.

    ! no head or mouth. ! no tissues or organs. ! digestion by collar cells.

    These animals may have one of two main body forms: cylinder-shaped polyp or umbrella-shaped medusa. This phylum includes coral, jellyfish, sea anemones, and sea fans. Characteristics include: ! two cell layers

    separated by a jellylike substance.

    ! radial symmetry. ! tentacles with stinging

    cells. ! a digestive cavity with

    one opening.

    Many of these animals are parasitic. This phylum includes tapeworms and planarians. Characteristics include: ! bilateral symmetry. ! three cell layers. ! a digestive cavity with

    one opening. ! no circulatory or

    respiratory systems.

    These animals are mainly parasitic and live in soil, water, or dead tissue. This phylum includes trichinae, hookworms, and pinworms. Characteristics include: ! a tubular body with

    bilateral symmetry. ! a digestive tract with

    two openings. ! sexual reproduction.

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    All chordates have a strong, flexible, rod-like notocord at some stage in their lives. Chordates also have pharyngeal gill slits and a hollow dorsal nerve cord.





    Adult tunicates are marine, saclike animals that are usually sessile. Only free-swimming larvae have a notocord and other chordate characteristics.

    Lancelets are thin, fish-like marine animals. Characteristics include: ! long, thin, flattened bodies. ! no jaw and a lack of appendages. ! basic chordate features

    throughout life.

    A vertebral column replaces the notochord in most vertebrates. The vertebral column encloses and protects the nerve cord. Vertebrates can be divided into seven classes. (For more information about these classes, see the next page.)











    This class includes the jawless hagfishes and lampreys. Characteristics include: ! a cartilaginous skeleton ! a notochord that is present

    throughout the animal’s life ! a rasping mouth that is used to

    bore a hole in the side of prey, usually another fish

    This class of jawed, cartilaginous fishes includes sharks, rays, and skates. Characteristics include: ! a notocord at birth that is

    replaced by vertebrae in adults ! cold-bloodedness (typically) ! a tail fin that is usually

    asymmetrical ! pectoral and pelvic fins ! respiration through gills

    This class of animals includes fishes such as catfish, eel, flounder, trout, and tuna. Characteristics include: ! a bony jaw

    and skeleton ! scales ! paired

    pectoral and pelvic fins

    ! a tail that is usually symmetrical

    ! cold-bloodedness (typically) ! respiration through gills ! oviparous (egg laying)

    reproduction. A few have viviparous (live birth) reproduction

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    Most amphibians live part of their lives in water and part on land. Most hatch and begin life in water, and most return to the water as adults to mate and reproduce. This class includes two main orders: Anura (frogs and toads) and Urodella (salamanders). Characteristics include: ! the laying of eggs without shells. ! growth from larva to adult through a process of

    metamorphosis. ! cold-bloodedness. ! hibernation during harsh winters and estivation in

    warm, dry climates. ! smooth skin, though some toads have thick, leathery

    skin (scales absent). ! larval respiration through gills. ! respiration in most land-dwelling adults through lungs,

    and respiration in most water- dwelling adults through gills. Some adults have both lungs and gills.

    ! absorption of oxygen through the skin and through the lining of the mouth and throat.

    Most reptiles belong to one of three main orders: Chelonia (turtles and tortoises), Crocodilia (alligators and crocodiles), and Squamata (lizards and snakes). Characteristics include: ! scales, which prevent the body from drying out. ! respiration through lungs. ! cold-bloodedness. ! a venomous bit (in some cases). ! growth, in many cases, by the shedding of skin

    several times each year. ! leathery-shelled eggs (in most cases), though some

    give birth to live young. ! hibernation during the

    winter and estivation in tropical climates.

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    Classification of Living Things - Organization of Living Things (III.2.MS.1)

    This site is a teacher resource that covers the classification of living things as it relates to the principles of taxonomy with a focus on human classification categories. Web expeditions, an audio glossary and related sites enhances this site.

    Five Kingdoms - Organization of Living Things (III.2.MS.1) e=true

    Students will watch a short movie on the five kingdoms detailing the major characteristics found within each kingdom. Students may take a quiz after the movie. Additional links to more information and extension activities are available.

    Virtual Fish Tank - Organization of Living Things (III.2.MS.1)

    This site allows students to create his/her own fish by manipulating different characteristics. These fish can then be "released" into a community tank. Each fish is tagged and can later be caught and get details of it's life. Using information from the entire class, the fish can be grouped by features and determine which of the features affects different aspects of its life.

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    Assessment Grade 7


    Classroom Assessment Example SCI.III.2.MS.1

    Students will classify a variety of organisms into groups according to their structure. Students will use the following categories:

     vertebrate/invertebrate  categories of vertebrates:

    • mammals • birds • fish • amphibians • reptiles

     single-celled/multi-cellular  flowering/non-flowering

    These categories could be used in class games such as Jeopardy or Concentration.

    (Give students rubric before activity.)

    Scoring of Classroom Assessment Example SCI.III.2.MS.1

    Criteria Apprentice Basic Meets Exceeds

    Correctness of classification

    Classifies with 60-69% accuracy.

    Classifies with 70-79% accuracy.

    Classifies with 80-99% accuracy.

    Classifies with 100% accuracy.

    Identification of common characteristics

    Lists one common characteristic for each category.

    Lists two common characteristics for each category.

    Generalizes several key characteristics for each category.

    Compiles a detailed description of common characteristics for each category.

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    Life Science Worksheet

    GRADE LEVEL: Seventh

    Topic: Organization of Living Things

    Grade Level Standard: 7-1 Compare and contrast living things.

    Grade Level Benchmark: 2. Explain how selected systems and processes work

    together in animals. (III.2.MS.4)

    Learning Activity(s)/Facts/Information

    Central Question: How are the parts of living things adapted to carry out specific functions?

    1. The Living Skeleton (See Web Site) The Living Skeleton has x-ray images of human skeletons with descriptions and images. For example, students can see a picture of a normal arm bone and then a fractured arm bone, they can also see images of the fractured arm after the surgery to fix it.

    2. Virtual