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Unit 2 Diversity of Life
Chapter 9 Sponges, Cnidarians, and Worms

Section 9-3 Cnidarians


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Previous: Sponges         Next: Worms

Teacher Resources          Student Extra Credit

 

9-3 Cnidarians
Body Structure
Obtaining Food
Movement
Reproduction

Life in a Colony
Corals
Portuguese Man-of-War

 

Day 1
readme.gif - 802 Bytes 
Prentice Hall 307-311 and Globe Fearon 9-2
Pencil.gif - 434 Bytes Globe Fearon Lessson Review 9-2
Day 2
Pencil.gif (1165 bytes) Cnidarian Crossword Puzzle
Day 3-10 crayon0a.gif (328 bytes) Coral Reef Foldable Book

 

Day 1
Topic  9-3 Cnidarians
Objectives
Name four cnidarians.
Describe the body systems of cnidarians.
Analyze body symmetry and feeding patterns.
Describe body systems in worms.
State Goals
Classwork-Homework
Chalkboard.bmp (15654 bytes)
On the Board
Cnidarians:
invertebrate animal with stinging cells and a hollow body               
Polyp:
Cuplike form of a cnidarian
Medusa:
Umbrella-like form of a cnidarian
Tentacles:
long, thin armlike structures

 Chalkboard.bmp (15654 bytes) On the Board

Cnidarian Classes

Jellyfish Class: Schyphozoa
Coral and Sea Anemones

  Class: Anthozoa

Hydra & Portuguese Man-0-War

  Class: Hydrozoa

 BrainPopIcon.bmp (19574 bytes) Cnidarians

readme.gif - 802 Bytes Prentice Hall 307-311

readme.gif (1442 bytes) Globe Fearon 9-2 What are Cnidarians

 Pencil.gif - 434 Bytes Lesson Review 9-1 What are Cnidarians

TEC
Resources
Order hydra and daphnia; depression slides

 

Day 2
Topic  Polyps and Medusas
Objectives
Explain how siphonophore is able to feed, defend and reproduce.
State Goals
Classwork-Homework
Note02.gif (247 bytes) Cnidarian Notes     

Chalkboard.bmp (15654 bytes)
On the Board
Cnidocyte: a stinging cell in a cnidarian
Nematocyst: the stinging mechanism in a cnidocyte
Venom: poison

Chalkboard.bmp (15654 bytes)
On the Board

Cnidarian Names

Jellyfish Coral &
Sea Anemones
Hydra &
Portuguese
Man-0-War
Class: Schyphozoan

 Class: Anthozoan

Class: Hydrozoan
Box

  Brain Coral

Green Hydra
Moon Tube Coral Brown Hydra
  Staghorn Coral  
  Lettuce Coral  
  Fire Coral  
  Sea Fan  

 Computer.bmp (3254 bytes) Cnidarians

crayon0a.gif (328 bytes) On back of Cnidarian Notes divide paper into 1/3 Label the class and draw examples

        Schyphozoan: Jellyfish
        Anthozoan: Sea Anemone, Coral
        Hydrozoan: Hydra, Portuguese Man-0-War

star.gif (2279 bytes) Cnidarian Wordsearch   has answers for puzzle

Pencil.gif (1165 bytes) Cnidarian Crossword Puzzle

TEC
Resources
Note02.gif (247 bytes) Sea Anemones   Diagram and Information

 

Day 3
Topic Coral
Objectives
Identify the body forms of cnidarians and classify cnidarians as a medusa or a polyp.
Students will learn about coral and decide whether coral is a rock, plant, or animal.
Explain how cnidocytes get food.
Identify the two cell layers of cnidarians.
Explain why cnidarians are more complex than sponges  because their cells are organized into tissues.
Create a model of a coral reef.
List different common names of coral.
State Goals
Classwork-Homework

BrainPopIcon.bmp (7158 bytes)  Coral


crayon0a.gif (328 bytes) Coral Reef Foldable Book Directions
Make a 9-Tab foldable book about coral.  Use to record information.

CORAL REEFS





What Is
Coral #1
Coral Types #2 Coral
Names #3
Reef Types #5 Reef Community #6 Reefs In Danger #7 Food Chain #9
Reproduction #11
?
#12

Paperpencil.gif (4347 bytes) What is Coral? #1
Coral is an animal.
Existed 500 Million years.
Animal lives inside a home made of its own secretions.
Coral develop in shallow, warm (70 and 85 ° F (21 - 30 °C), clear, ocean water.
The reef is formed from coral polyps that leave behind a skeleton of limestone.
Coral reef  habitats are rich in life. Contain 25% of ocean's species.

Paperpencil.gif (4347 bytes) Coral Types #2

Hard corals Brain coral and Elkhorn coral Hard, limestone skeletons;
Hard corals form the basis of coral reefs.
Soft coral Sea fingers and Sea Whips Soft coral does not build reefs.

Paperpencil.gif (4347 bytes)  Coral Names #3
List different names of coral.   

Blue Coral Brain Coral Staghorn Sea Fan
Sea Fingers Sea Whips Lettuce Plate Pillar
Pacific Coral Potato Chip Coral Mushroom Coral Lace Coral
Fire Coral Crust Coral Leather Coral Lichen Coral
Pink Coral Black Coral Wire Coral  

crayon0a.gif (328 bytes) Coral Reef Piano Fold Book  #4
Draw 4 Corals: Sea Fan, Elkhorn, Flower, Brain,
Coral Diagram

TEC
Resources
IconMap.bmp (3402 bytes) Map of Bermuda   Coral Map
readme.gif (1442 bytes) Flower Gardens of Coral Reefs   Describes life at different levels on a coral reef.
crayon0a.gif (328 bytes) Pacific Coral Reef Coloring Book  Neat border for room.

 

Day 4
Topic  Coral Reefs
Objectives
Read for information and label a diagram.
State Goals
Classwork-Homework
 
Paperpencil.gif (4347 bytes)  Types of Reefs: #5

Fringing reefs Reefs that form along a coastline.
They grow on the continental shelf in shallow water.
Barrier reefs Grow parallel to shorelines but farther out.
Usually separated from the land by a deep lagoon.
Form a barrier between the lagoon and the seas impeding navigation.
Coral Atolls Rings of coral that grow on top of old, sunken volcanoes in the ocean.
They begin as fringe reefs surrounding a volcanic island. 
Then, as the volcano sinks, the reef continues to grow.
Eventually only the reef remains.

filmstrip.gif - 6075 Bytes  Filmstrip: Cnidaria

crayon0a.gif (328 bytes) Cnidarian Piano Fold Book
Draw other Cnidarians: Jellyfish, Sea Anemone, and Portuguese Man-O-War

TEC
Resources
Note02.gif - 247 Bytes
  Coral Reefs: Science Weekly Teacher Notes
readme.gif (1442 bytes)  Coral Reefs: Science Weekly Add to Coral Reef Piano Fold Book

 

Day 5
Topic  Coral Reefs
Objectives
List the three types of reefs.
List members of a coral reef community.
List reasons why coral reefs are in danger.
Understand that coral reefs are formed by coral animals.
Understand the conditions corals need to grow.
Draw a food web of a coral reef.
State Goals
Classwork-Homework

 Computer.bmp (3254 bytes) Who's Who On a Coral Reef
Paperpencil.gif (4347 bytes) Coral Reef Community #6
Put all animals on board. 
Have kids choose 10 living things to write under tab 4.
You can add more!                                                                            
                                                                                         

Sponges Black Tip Reef Shark Giant Grouper Clown Fish
Eel Angel Fish   Red Snapper   Scorpion Fish
      Sea Birds    Clams Sea Stars Crabs
Shrimp Lobsters Turtles Sea Snakes
Snails Octopus Scallops Algae
Sea Slugs Angel Fish Sea Urchin Zooplankton
Phytoplankton Lumphead Wrasse    

Pencil.gif (1165 bytes) Treasures of the Great Barrier Reef  Dichotomous Key of Fish
Note02.gif (247 bytes) Marine Life  Jellyfish Coloring   More Jellyfish Drawings

Paperpencil.gif (4347 bytes)  Coral Reefs in Danger #7
Write 7 threats on board.
Discuss each one.
Add to Coral Book

Note02.gif (247 bytes) 30% of coral reefs worldwide are "severely damaged," and up to 60% could be lost by 2030

Major Threats to Coral Reefs

Water Pollution from sewage and agricultural runoff
Careless collecting
of coral specimens
reefs and species damaged or destroyed
Sedimentation  when silt or sand from construction or mining projects muddies
the waters of a reef and kills coral, which needs light to live
Coastal Development loss of habitat
Destructive fishing
practices
Cyanide fishing, Overfishing, Blast fishing
Increased
Carbon Dioxide
Makes skeleton weaker
Ozone Depletion Ultraviolet radiation in shallow areas

crayon0a.gif (328 bytes) Coral Reef Piano Fold Book #8
Choose 5 more coral reef community members to draw on cover.

TEC
Resources
crayon0a.gif (328 bytes) Coral Reef Coloring Page
Computer.gif (1114 bytes) Coral Colors
Computer.gif (1114 bytes) Coral Reef Plants
Computer.gif (1114 bytes) Reef Fish 
Nice reference for fish colors

 

Day 6  
Topic  Real Life Situations
Objectives
Students will be able to construct a pyramid of numbers using data from a Bermudian coral reef.
Introduces specific human activities that can have an impact on coral reefs world wide
State Goals
Classwork-Homework
BrainPopIcon.bmp (7158 bytes) Food Chains
Paperpencil.gif (4347 bytes) Coral Reef Food Chain #9

Building a Bermudian Coral Food Pyramid

Use the food web to draw a food chain with coral in it.

Discuss: Coral Reef Food Web

Lecture.gif (2227 bytes) Reefs at Risks
Explain the scenarios are factual.
Read the following scenario to the class.


Overfishing in the Philippines, Guam, and Indonesia has caused the disappearance of red snapper and giant grouper from entire areas. Without these predators in the area, the sea urchin population has increased. Sea urchins kill live coral as they feed on algae. Eventually, algae growth overtakes the coral, and new polyps cannot grow. Explain the effect these changes might have on the food web you have made.

State what the problem is.
Overfishing

Name the populations that will decrease.
Red Snapper and Grouper will decrease.
Coral will decrease.
Algae will decrease

Name the populations that will increase.
Sea urchin

Will the reef survive?

TEC
Resources
Pencil.gif (1165 bytes) Cnidarian Crossword Puzzle

 

Day 7
Topic Coral Reef Longitude and latitude.  
Objectives
Label the continents of the world on a map of the Earth.
Label the oceans of the world.
Label the seas.
Identify locations by using longitude and latitude.
State Goals
Classwork-Homework
IconMap.bmp (3402 bytes) Coral Locations in the World #10 not in book
Pencil.gif - 434 Bytes Coral and Coral Reefs

Pencil.gif (1165 bytes)  World Map page 3

TEC
Resources
Earth.gif - 6650 Bytes Maps of World
 Earth.gif - 6650 Bytes   MotherJones Coral Reef Page

 

Day 8
Topic Coral Foldable Book
Objectives
Draw and label a diagram of coral reproduction.
State Goals
Classwork-Homework
Paperpencil.gif (4347 bytes) Reproduction #11 
How Are Reefs Formed 
Draw coral life cycle in picture.
Coral Life Cycle Coloring Page and Reproduction Information     
TEC
Resources.

 

Day 10   
Topic  Coral Foldable Book
Objectives
Draw and label a diagram of coral
State Goals
Classwork-Homework
Pencil.gif - 434 Bytes #12 Coral Diagram
TEC
Resources

 

Day 10   
Topic  Daphnia and Hydra
Objectives
Use a microscope and hand lens to observe daphnia and hydra.
Identify and diagram a food chain.
State Goals
Classwork-Homework
 Magnify0b.gif - 341 Bytes 
Hydra vs. Daphnia
           1. Draw and label Daphnia and Hydra
           2. Observe using hand lens.
           3. Observe using microscope on low power.

Lecture.gif (2227 bytes) Hydra Anatomy

TEC
Resources

Previous: Sponges         Next: Worms



TEACHER RESOURCES

 Pencil.gif - 434 Bytes Activities    crayon0a.gif - 328 Bytes  Art   Magnify0b.gif - 341 Bytes Investigations   
Note02.gif - 247 Bytes  Resources   SchoolBus5.bmp (1581 bytes) Field Trips   Earth.gif - 6650 Bytes Web Sites

ANIMALS INVERTEBRATES
 Pencil.gif - 434 Bytes  Animal Ethics and Marine Studies
 Pencil.gif - 434 Bytes  Invertebrate Critter Cards  Cnidarians, Annelids, Mollusks, Echinoderms, and Arthropods.  Match pictures to Phylums.
 Pencil.gif - 434 Bytes  Invertebrate Research Packet
 Pencil.gif - 434 Bytes  The Shape of Life  44 pages   Good phyla activity.  Phyla Comparison Chart p.24
 Pencil.gif - 434 Bytes Taxonomic Twisters Worksheet  Animal investigation activity.  Nice worksheet!
 Note02.gif - 247 Bytes  Invertebrate Lecture Notes
 Note02.gif - 247 Bytes Kingdom, Plants, Invertebrate, Vertebrate Charts with answers
 Note02.gif - 247 Bytes  Sea Life  Student Fact Sheet
 Note02.gif (247 bytes) Survey of the Animal Kingdom  From sponges to chordates
 Note02.gif - 247 Bytes  Wonderful Wacky Water Critters
 Earth.gif - 6650 Bytes Animal Diversity Web
CNIDARIANS
 Note02.gif - 247 Bytes  Cnidaria
 Note02.gif (247 bytes) Cnidarians  Characteristics and examples of stinging-celled animals.
 Earth.gif - 6650 Bytes  Cnidaria Home Page
 Earth.gif - 6650 Bytes  Cnidarians: Simple but Deadly Animals
 Earth.gif - 6650 Bytes  Introduction to Cnidaria  Jellyfish, corals, and other stingers
CORAL
 Pencil.gif - 434 Bytes  Coral and Coral Reefs  Map of oceans for identifying coral sites.
 Pencil.gif - 434 Bytes  Coral Polyps and Coral Reefs  Students will learn about coral and decide whether coral is a rock, plant, or animal.
 Pencil.gif (1165 bytes) Who Eats Whom In a Bermudian Coral Reef?
 Magnify0b.gif - 341 Bytes  Growing Coral  Students will observe the growth of crystals that develop in a way similar to how coral polyps create their calcium carbonate cups.
 Magnify0b.gif - 341 Bytes  Sexy Coral Reef and I Want My Own Space  In these activities you will learn about some of the adaptations that have helped insure the success of the next generation of coral.
 Magnify0b.gif - 341 Bytes  What If the Reef Dies This lesson will provide opportunities to model, using simple laboratory materials, some aspects of reef ecology.  In addition, student conclusions drawn from the activities will be referenced to known data.   Finally, students will be asked to consider what they can do to insure reef survival.
 crayon0a.gif - 328 Bytes  Bermuda Reef Diorama  In this activity you will make a model of a coral reef so that you can see for yourself all the organisms living in this ecosystem.
 crayon0a.gif - 328 Bytes  Build a Reef  While building a coral reef, you will discover the organisms that make up this special ecosystem.
 crayon0a.gif (328 bytes) Coral Reef Coloring Page
 crayon0a.gif - 328 Bytes  Coral Reefs, Polyps, and Heads  Build an individual polyp.  Combine polyps to form head (colony)
 crayon0a.gif - 328 Bytes Create a Coral Reef Build a Diorama with brain coral, sea fan, sea anenome, and sponge.  Take it to the Next Level Add jellyfish, volcano sponge, finger coral, and tube sponge.
 crayon0a.gif (328 bytes) How Are Reefs Formed    Coral Life Cycle Coloring Page
 readme.gif (1442 bytes) Coral Reef from Ask the Aquarium from Baltimore  2 page pdf
 Note02.gif - 247 Bytes  Coral Reefs: Science Weekly  Neat 6 page magazine
 Note02.gif - 247 Bytes Threats to Coral Reefs
 Note02.gif - 247 Bytes  Zooanthellae  Zooxanthellae are unicellular yellow-brown (dinoflagellate) algae which live symbiotically in the gastrodermis of reef-building corals.
 Earth.gif - 6650 Bytes  Bermuda's Coral Reefs
 Earth.gif - 6650 Bytes  Coral: Ocean Oasis
 Earth.gif (6650 bytes) Coral Reefs: Jumpstart
 Earth.gif (6650 bytes) Coral Realm  Fish and shark Encyclopedias and more!
 Earth.gif - 6650 Bytes  Coral Reef PhotoBank
 Earth.gif - 6650 Bytes  Corals and Anemones  A Sea & Sky site.
 Earth.gif - 6650 Bytes  Reef Relief: Protect Living Coral  A group dedicated to protect coral.
DISSECTION
 Pencil.gif (434 bytes)  Animal Dissection: Where Do You Stand?  Survey
HYDRA
 Pencil.gif - 434 Bytes  Hydra: The Green Predator
 Magnify0b.gif - 341 Bytes  How Does a Hydra Respond to Stimuli?
 Magnify0b.gif - 341 Bytes  Hydra Bioassay  This experiment measures the reaction of hydra to any toxic compounds present in fresh water. The test can be used to measure the toxicity of household water, industrial wastewater, and treated or untreated surface or ground water.
 Magnify0b.gif (341 bytes) Hydra Lab
 Magnify0b.gif - 341 Bytes  Hydra Lab Worksheet
 Magnify0b.gif - 341 Bytes  Hydra vs. Daphnia  Information and diagram.  Setting up habitats.  Food Chain Lesson.  Observation of hydra and daphnia.  Put animals together.
 Earth.gif - 6650 Bytes Hydras  Great pictures!
   Hydra  Article and diagrams.
IMAGES
 camera.GIF (174 bytes) JellyfishSolitary Jellyfish,   Portugese Man-O-WarMan-O-War,   Rhizostomeae,   Group,   Glowing, Box Jelly
INVERTEBRATES
 Pencil.gif (434 bytes)Marine Life    Circle the Invertebrates  Nice line drawings of sea urchin, jellyfish, sand dollar, crab, shrimp, sea star, clam, scallop, lobster, horseshoe crab, anemone, scallop, sea star, octopus
JELLYFISH
 crayon0a.gif - 328 Bytes  Jellyfish Coloring Pages
 Note02.gif - 247 Bytes  Jellyfish Lecture
 Earth.gif - 6650 Bytes  Freshwater Jellyfish
 Earth.gif - 6650 Bytes  Jellyfish  A Sea Science site.  Jellyfish diagram, life cycle diagram, and nematocyst diagram.  Drawings of different species.
 Earth.gif - 6650 Bytes  Know Your Jellyfish: Some Sting, Some Don't  Great pictures of different jellyfish
KEYS, GUIDES, and CHECKLISTS
 Earth.gif - 6650 Bytes  Invertebrate Key
LANGUAGE ARTS
 Pencil.gif (434 bytes)   Animal Imagery  Similes and metaphors
PARASITES
 Earth.gif (6650 bytes) Animal and Human Parasite Images
PLANKTON
 Magnify0b.gif (341 bytes)  Plankton  During this activity, students will learn how to collect plankton and use microscopes to observe and identify it.
PORTUGUESE MAN-O-WAR
Pencil.gif - 434 Bytes  Portuguese Man-O-War Worksheet
SEA ANEMONE
 crayon0a.gif - 328 Bytes  Sea Anemone Coloring Sheet
 Earth.gif - 6650 Bytes  Sea Anemone Diagram
 Earth.gif - 6650 Bytes  Sea Anemones  Basic information and pictures from Marine Biology
 Earth.gif - 6650 Bytes  Sea Anemones  Information and pictures.
WEB QUESTS
 sherlock.gif - 324 Bytes   Case of the Changing Bering Sea Environment   Introduction
 sherlock.gif - 324 Bytes Coral Reef Fish Count     Pencil.gif (1165 bytes) Data Sheet
 sherlock.gif - 324 Bytes   Creatures of the Deep  Investigate the animals and answer the questions.

 


STUDENT EXTRA CREDIT

 star.gif - 2279 Bytes Extra Credit star.gif - 2279 Bytes

star.gif - 2279 Bytes  Have the students create a collage of photos of different types of coral to create their own reef. You can use the pictures from the Coral Reef Photobank. They can create their virtual reef based on the region, or they can make a global composite reef.
 star.gif - 2279 Bytes  Coral Reef: Did You Know? Cards   Print out 10 "Did You Know Cards."  Research facts and information about coral Reefs.  Write your facts and information on the cards.
 star.gif - 2279 Bytes  Geography Worksheet  Use an Atlas and find the answers.
 star.gif - 2279 Bytes  Great Barrier Reef  Read the book fill in the chart  and answer the questions.
 star.gif - 2279 Bytes Introduction to Cnidaria  Jellyfish, corals, and other stingers
 star.gif - 2279 Bytes  Invertebrate Coloring Page  Jellyfish, Coral, Sponge, Scallop, Starfish, and sea Squirts.
 star.gif - 2279 Bytes  Jellyfish and Sea Anemone Comparison Chart  Ways they are alike and different.
 star.gif - 2279 Bytes Marine Life Matchup
 star.gif - 2279 Bytes Ocean Diorama   Use the patterns to create a shoe box diorama of the ocean
 star.gif - 2279 Bytes  Phylum Study  Choose a phylum, choose an animal draw a picture, write a report, and create a list.
 star.gif - 2279 Bytes  Reef Scavenger Hunt Worksheet
 star.gif - 2279 Bytes  Research  6 animals have been identified as the most dangerous in Australia.  You are to investigate each animal and rank them from most dangerous to least dangerous.
 star.gif - 2279 Bytes Sea Anemone and Sea Star Coloring Page  Coloring sheet from the Monterey Aquarium
 star.gif - 2279 BytesShells and Coral Coloring Page   Coloring sheet from ABC Teach


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