5E Essential Lesson. SC.6.L Classification

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1 5E Essential Lesson SC.6.L Classification

2 Engage Me and Taxonomy Today you will begin your career as a taxonomist. Taxonomy is the science of classification. What is classification? Why do you think it might be important to classify living things? Your first goal is to identify commonly known organisms based on their physical traits.

3 Before you start, let s review. How are vertebrates and invertebrates different? What are examples of vertebrates? What are examples of invertebrates? (SC.3.L.15.1, SC.3.L.15.2, SC.5.L.14.2)

4 Let s Begin!...Who am I? I am a skilled predator with electrical sensors that allow me to sense the electrical currents of my prey. Who am I? Lateral line system Don t agree? What else do you need to know?

5 I lay eggs. Who am I? Don t agree? What else do you need to know?

6 I am a formidable competitor with venomous spurs on my back legs. Who am I? Don t agree? What else do you need to know?

7 I have a paddle-shaped tail that helps propel me through the water. Who am I? Don t agree? What else do you need to know?

8 I have a voracious appetite and eat 20-30% of my body weight daily. My meals consist of gravel, insect larvae, and freshwater shrimp. Who am I? Don t agree? What else do you need to know? What eats rocks? All birds eat gravel and small stones to help them digest their food. The rocks, stones or gravel go into the gizzard, a part of the bird s digestive system where food is ground into smaller pieces. The stones move around in the gizzard and do the grinding. Gizzard stones are also called stomach stones and gastroliths. Some reptiles such as crocodiles also eat rocks to use as gizzard stones. Some dinosaurs used to eat rocks too and for the same purpose that birds still eat them today.

9 I lose my teeth early in life, and have rough patches in my mouth. Who am I? Mammals with No Teeth Pangolin only scaled mammal in existence Giant Ant Eater Don t agree? What else do you need to know?

10 I have webbed feet. Who am I? Blue-footed boobies Flying frog Don t agree? What else do you need to know?

11 I have hair and store my young in a pouch. Who am I? Koala bear Kangaroo Quokka Don t agree? What else do you need to know?

12 I have a bill. Where do I belong? Toucan Shoe Bill Roseate Spoonbill Don t agree? What else do you need to know?

13 Who am I? I lay eggs on land. I have venomous spurs on back legs. I eat 20-30% of my body weight daily. I eat meals consisting of gravel, insect larvae, and freshwater shrimp. I have paddle-shaped tail that helps propel me through the water. I lose teeth early in life. I have webbed feet. I have hair. I have a bill. I store young in a pouch. I have electrical sensors on my bill.

14 I am a duck-billed platypus! Based on its physical traits, is a platypus a fish, amphibian, reptile, bird, or mammal? Why is classification sometimes difficult?

15 Monotremes are mammals that lay eggs instead of giving birth to live young. Introduction to SC.7.L.15.2 Theory of Evolution Based on the diagram, what group of living things did monotremes such as the platypus evolve from? How does this additional knowledge help to explain the characteristics of the platypus?

16 Explore Kingdoms Cards How are eukaryotic and prokaryotic cells alike and different? Which type of cell do you think is more complex? Why?

17 Explore Argumentation Session 1 2 3

18 Why is classification sometimes difficult? Why do you think classification systems have changed over time? Is their one right classification system?

19 Explain Explain Domain There is an even larger classification group than kingdom and it is called a domain. Each kingdom fits within one of the three domains. The domains are Archaea, Bacteria, and Eukarya. What are the six kingdoms of life? What kingdom have you not explored? Organize your Kingdom Cards into the three Domains of Life, Bacteria, Archaea, and Eukarya. How are domains and kingdoms related?

20 Use the information on the cards to complete the domains and kingdoms of life concept map Leave Kingdom Protista blank for now. Protista

21 Elaborate Problematic Protists

22 Common Name: Common Name: Common Name: Number of Cells: Habitat: Habitat: Habitat: Why Type of Cells: do you think Type classification of Cells: systems Type of have Cells: changed Energy Source: Number of Cells: Number of Cells: Why is classification sometimes difficult? over time? Energy Source: Energy Source: Cell wall: Cell wall Cell wall: Cell wall Cell wall: Cell wall Is their one right classification system? Chloroplasts: Chloroplasts: Chloroplasts: Kingdom: Protist Kingdom: Protist Kingdom: Protist

23 You have explored the domains and kingdoms of living things, but there are more specific classification groups. Review: How are domains and kingdoms related?

24 How do you think kingdoms and phyla are related? Which taxon (classification group) contains the most types of organisms? Which taxon is the most specific?

25 The scientific name of giant kelp is Macrosystis pyrifera. How are living things scientifically named? When I was little, I memorized the sentence, Distinguished King Phillip Can Order Fresh Green Spinach, in order to recall the taxonomic levels. How are you going to remember them? Scientific Name: Macrosystis pyrifera

26 Evaluate What about Me??????? What is the scientific name for human beings? Homo sapiens

27 Evaluate What about Me? Human cheek cells Human nerve cells Human heart cells Are humans eukaryotic or prokaryotic? Why? Within which domain do humans belong? Why? Within which kingdom do humans belong? Why? Do you think that humans will could ever be scientifically reclassified? Why or why not?

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