An Introduction to the World of Invertebra tes
Dec 21, 2015
I CAN & Focus Question
I CAN Statement: I CAN identify characteristics of invertebrates through an observational gallery walk.
Focus Question: How can we classify invertebrate animals?
Brainstorm/Warm-up
Today we will continue to learn how to classify animals. Just to get your minds going, you’ll have one minute to write down as many animals as you can think of on the index card.
Ask Scholars: (after recorded answers on T Chart) What does it mean to classify? What was the criterion for grouping the animals? What is the key difference between vertebrates and
invertebrates? What are the five major vertebrate groups? What are some examples of each group?
Vertebrates vs. Invertebrates
Invertebrates Vertebrates0
20
40
60
80
100Percent of animals in the world
Percent of ani-mals in the world
*Are there more vertebrates or invertebrates in the world?
*About 95% of the animals on earth are invertebrates and only 5% are vertebrates.
*If there are more invertebrates in the world, why do you think we wrote down mostly vertebrates?
Invertebrate Basics!
Invertebrates do not have a backbone or spine.
All invertebrates are cold-blooded
6 major groups: Porifera Cnidarians (c is silent) Worms (not scientific name) Mollusks Echinoderms Arthropods.
What’s in the Invertebrate Gallery?
In a moment, you will participate in a Gallery Walk for Invertebrates!
There are six stations setup in the classroom (porifera, cnidarian, worms, mollusks, echinoderms, and arthropods).
Each station contains pictures of various animals classified under each invertebrate group.
Your Task: Is to rotate through each center, observe different invertebrates and record your observations on your chart.
You will have 3 minutes at each station.
Ask Scholars: *What were some animals that you saw in each phyla/class? *What were some observations of each phyla/class? ?
Closure: Exit ticket
OPTIONAL STUDYJAM
SCHOLARS WILL WRITE3 things you discovered
2 interesting things1 question you still have
http://studyjams.scholastic.com/studyjams/jams/science/animals/invertebrates.htm
I CAN & Focus Question
I CAN Statement: I CAN identify characteristics of invertebrate animals and classify them into six major groups.
Focus Question: How can we classify invertebrate animals?
SCHOLARS Copy I CAN statement and Focus Question to
notebook.
Poriferans
No tissues or organs: simplest animals
Most live in salt water attached to sand or rocks.
Their bodies are full of pores and have canals which water flows through giving it nutrients and oxygen.
Do not move around, stay fixed in one place: SESSILE
Asymmetrical (No symmetry)
Examples: Sponges
Cnidarians
Cold-Blooded Invertebrates
More complex than sponges: tissues, a gut for digesting food, and a nervous system BUT no organs.
Tentacles with stinging cells called NEMATOCYSTS used to feed on animal.
They come in two body shapes:
Polyp: sessile and vase-shaped
Medusa: free-swimming and bell-shaped
Radial symmetry
Examples: Corals, Hydras, Jellyfish
Poriferans and Cnidarians
Watch Video: (11mts)
Watch Video: (3:30-5:12)
https://www.youtube.com/watch?v=DuQcmpHZ9tQ#t=436
http://www.ghanatubes.com/view/104/animals-around-us-invertebrates-what-are-they/
Closure: Lab Notebook
SCHOLARSIn a few sentences, write what you learned
about Poriferans and Cnidarians in your lab notebook.
I CAN & Focus Question
I CAN Statement: I CAN identify the characteristics of annelids and arthropods.
Focus Question: What are the characteristics of annelids and arthropods?
SCHOLARSCopy I CAN statement and Focus Question to
notebook.
AnnelidsAnnelids are segmented worms that do not have
legs.
They have long tube-shaped bodies that are divided into a series of rings.
Earthworms burrow through and live in wet soil or water and eat vegetation.
Leeches are parasites that feed on small invertebrates (earthworms) or human blood.
Bilateral symmetry
Examples: Earthworms, Leeches, Clam worms
Arthropods
• They have jointed legs and a segmented body.
• Their body is divided into three parts: head, thorax, and abdomen.
• Largest group of animals on earth: insects
Examples: Insects, Arachnids, Lobsters, Shrimp, Centipedes, Millipedes
Arthropods cont….
• Arthropods bodies are protected by a hard outside covering which sheds as they grow: EXOSKELETON
• They have digestive and nervous system
• Some arthropods use camouflage to blend into their habitat
• Bilateral symmetry
Annelids and Arthropods
Watch Video: annelids
Watch Video: arthropods
https://www.youtube.com/watch?v=Xmtdm-tfnCA#t=55
https://www.youtube.com/watch?v=2bBHKHhgjeM
Closure: Lab Notebook
SCHOLARSIn a few sentences, write what you learned
about Annelids and Arthropods in your lab notebook.
I CAN & Focus Question
I CAN Statement: I CAN identify the characteristics of mollusks and echinoderms.
Focus Question: What are the characteristics of mollusks and echinoderms?
SCHOLARS Copy I CAN statement and Focus Question to
notebook.
Mollusks
Soft bodies which is sometimes protected with hard shells. (Octopus does not have shell)
They breath through lungs or gills and have organs
Some with tentacles or arms with suction cups
They live on land and in water
Bilateral symmetry
Examples: Snail, Oyster, Clam, Squid, Octopus, Slug
Echinoderms
• Bodies covered with spiny skin outer covering
• They have bodies with at least 5 sections
• They have suction cup tube feet to walk
• Radial symmetry
Examples: Starfish, Sea Urchins, Sea Cucumbers, Sea Dollars
Mollusks and Echinoderms
Watch Video: (6:20-8:20)
Watch Video: Mollusks
Watch Video: Echinoderms
http://www.ghanatubes.com/view/104/animals-around-us-invertebrates-what-are-they/
http://www.ghanatubes.com/view/104/animals-around-us-invertebrates-what-are-they/
http://www.schooltube.com/video/f880c67b5ec743e5ac41/Mollusks%207
Closure: Lab Notebook
SCHOLARSIn a few sentences, write what you learned about Mollusks and Echinoderms in your lab
notebook.
I CAN & Focus Question
I CAN Statement: I CAN demonstrate my understanding of classifying invertebrate animals into six groups.
SCHOLARSCopy I CAN statement to notebook.
Invertebrate Animal Groups Poster Activity
MATERIALS½ sheet of chart paperMarkers, crayons
PROCEDURESDivide class into 6 groups and assign each group one of
the animal groups.Have members in each group make a poster that list
the characteristics of their animal group. Then have members of each group draw and color
illustrations of animals in their animal group.Have each group present their poster to the class and
discuss ways the animals are alike and different.