Aims: SWBAT classify organisms using a dichotomous key.

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1 Name 57a Date: Course: Science/Ms. Lopez Homeroom: Aims: SWBAT classify organisms using a dichotomous key. Essential Question: How do dichotomous keys help scientists name newly discovered species? Do Now Directions: Look at the diagram below to find out which teacher you are most like. Do you love to be super organized? Yes No Do you like to swim? Do you like to run? Yes No Yes No Have you ever lived in a different country? Have you read the entire Twilight series? Have you ever been on a middle school sports team? Do you know the words to"cha Cha Slide"? Yes No Yes Ms. Brown Ms. Beasley Mr. Hawkins No Ms. Eley Yes No Yes No Ms. Roddey Ms. De Vries Mr. Siegel Ms. Maqsood 1) According to the Dichotomous Key above, what teacher are you most like?

2 Mini Lesson: Using a Dichotomous Key A key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, butterflies, etc. Keys consist of a series of choices that lead the user to the correct name of a given item. Dichotomous means divided into two parts. Therefore, dichotomous keys always give choices in each step. Here is an example of a dichotomous key. Suppose you have four insects (ladybug, housefly, dragonfly, and a grasshopper). After studying the insects, you might use wing covering, body shape, and where the wings point towards as the characteristics you wish to base your key upon. To begin the key, you could start separating the four insects based on wind covering: wings covered by exoskeleton versus wings not covered by exoskeleton. At the end of each statement you must direct the reader to the next appropriate question. 1.a. wings covered by an exoskeleton..go to step 2 b. wings not covered by an exoskeleton go to step 3. Next, you will use a pair of statements to separate each of the groups isolated by the above statements. If you isolate a subject you will give the name of the subject. 2.a. Body has a round shape ladybug b. Body has an elongated shape grasshopper 3.a.wings point out from the side of the body..dragonfly b. wings point to the posterior of the body housefly Hints for Using Dichotomous Keys 1. read both choices 2. Be sure you understand the meaning of terms involved.. 3. If the choice is not clear, try both divisions. If you end up with two possible answers, read descriptions of the two choices to help you decide. 4. Having arrived at an answer in a key, do not accept this as absolutely reliable. Check a description of the organism to see if it agrees with the unknown specimen. If not, an error has been made. The ultimate check is with an authentically named Type Specimen (one found in an official collection like a natural science museum).

3 Dichotomous Key 1. Has pointed ears... go to 3 Has rounded ears...go to 2 2. Has no tail... Kentuckyus Has tail... Dakotus 3. Ears point upward... go to 5 Ears point downward...go to 4 4. Engages in waving behavior... Dallus Has hairy tufts on ears...californius 5. Engages in waving behavior... WalaWala Does not engage in waving behavior...go to 6 6. Has hair on head... Beverlus Has no hair on head (may have ear tufts)...go to 7 7. Has a tail... Yorkio Has no tail, aggressive... Rajus

4 Dichotomous Key to the Animal Kingdom!! Directions: Use the dichotomous key below to name each of the animals in this crazy, mixed up animal kingdom. Follow these directions to learn how to use a dichotomous key. 1. Carefully observe the characteristics of the first animal. 2. Read the two choices in step #1 of the dichotomous key. 3. You must choose the correct choice for the animal you are trying to classify. 4. Once you have made your choice, follow the directions to move to the next appropriate line of the key. 5. Continue to make the correct choices for each animal until you have determined the name of the animal. Dichotomous Key to the Animal Kingdom 1. a. Has wings Go to line 2 b. Does not have wings go to line 3 2. a. Has antennae go to line 4 b. Does not have antennae Go to line 5 3. a. Has a tail Go to line 6 b. Does not have a tail go to line 7 4. a. Has red squares Myrtle b. Has red spots Mable 5. a. Has a red tail alfonzo b. Has a blue tail altonnio 6. a. Has a shell Go to line 8 b. Does not have a shell go to line 9 7. a. Has four legs go to line 10 b. Has more than four legs go to line a. Has a red tail Morganthau b. Has a blue tail Mabelene 9. a. Has a yellow tail Harry b. Has a green tail Hubert 10. a. Has red spots Belinda b. Has red squares lucinda 11. a. Has red spots Quincy b. Has yellow spots queenie

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6 BUTTON FAMILY DICHOTOMOUS KEY 1A 1B Thread shows when button is sewn on (flat button) go to 2 Thread does not show when button is sewn on (shank button) Go to 7 2A Button has 2 holes go to 3 2B Button has 4 holes go to 5 3A Button is oval nerd Dawg 3B Button is round go to 4 4A Button has a circle design Mr. G 4B Button has no design super Harry 5A Button is square, round corners Word Woman 5B Button is round go to 6 6A Button is large, white indignant Dog 6B Button is small, multicolored mr. POE 7A Button is square mr. Evidence 7B Button is round go to 8 8A Button is textured go to 9 8B Button is smooth mr. Right 9A Button is metallic evil Distractor Monster 9B Button is covered with fabric no Way Jose!

7 Button 1 Button 2 Button 3 Button 4 Button 5 Button 6 Button 7 Button 8 Button 9 Button 10

8 1a Two feet 2 1b Some other number of feet 3 Wacky People Key 2a Does not look at all human 4 2b Looks a lot like a human 5 3a One leg 6 3b Three or four legs 7 4a Fly-like 4b Not fly-like 8 Mosk Cara 5a Seems to be a girl 5b Not a girl 9 Rita Nita 6a Leg is curled, two feet 6b Leg is straight, one foot Ru-ela.Brella Giggles 7a Three legs 10 7b Four legs 11 8a Has webbed feet 8b Clawed feet 12 Hex Oculate 9a Curly hair, no toes Lugio Wirum 9b Wiggly looking mouth, three toes on feet C. Nile 10a Very long nose, open mouth 10b Some other appearance 13 Elle E. Funk 11a Has duck bill, two pinchers 11b No arms or pinchers 14 Tri D. Duckt 12a Has ears, tail, and beak 12b Four eyes on stalks Grif Leon Eggur Ondy 13a One eye, webbed feet 13b Four stalked eyes, four pinchers Cue Kide Quadrumenox 14a Three toed feet, nose like a flower 14b Spider-like, has spots Tunia petalos Patterned mulywumpus

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10 Answer Key #101 #102 #103 #104 #105 Dichotomous Key for Triangle Creatures 1. A. Sides are straight lines Go to 2 B. Sides are wavy lines Go to A. Has no eyes Go to 3 B. Has eyes Go to 5 3. A. Has flagella for movement Go to 4 B. Has cilia for movement Go to 7 4. A. The three sides are of equal length Triangulum equalius B. The three sides are not of equal length Go to A. Has crossed eyes Go to 6 B. Eyes not crossed Go to 9 6. A. Has a single flagellum for movement Triangulum monoflagelleum B. Has two or more flagella for movement Triangulum polyflagelleum 7. A. Total number of cilia for movement are odd Triangulum oddcilius B. Total number of cilia fo rmovement are even Go to 8 8. A. Has a pointed nose Triangulum pointiatus B. Has a rounded nose Triangulum roundiatus #106 #107 #108 #109 #110 #111 #112 # A. Has two cilia on each side for movement Triangulum biciliatus B. Has more than two cilia on each side Triangulum Polycilius 10. A. Has crossed- eyes Go to 11 B. Eyes not crossed Triangulum waveus (samplest correctus) 11. A. Lower half of the body has a dot pattern Triangulum ventrodotteus B. Upper half of the body has a dot pattern Triangulum dorsalidotteus 12. A. Has a pointed nose Triangulum pointiflagelleum B. Has a rounded nose Triangulum roundiflagelleum

11 Name Help! Scientists have discovered quite a few new creatures on planet Pamishan. They need your help to identify and classify them. Use the dichotomous key below to help scientist name each species! Dichotomous Key to Pamishan Creatures: 57b Date: C D E F G H I J K L M N O P Q R S T U 1. a. The creature has a large wide head..go to 2 b. The creature has a small narrow head...go to a. It has 3 eyes...go to 3 b. It has 2 eyes...go to 7 3. a. There is a star in the middle of its chest...go to 4 b. There is no star in the middle of its chest...go to 6 4. a. The creature has hair spikes...broadus hairus b. The creature has no hair spikes...go to 5 5. a. The bottom of the creature is arch-shaped...broadus archus b. The bottom of the creature is M-shaped...Broadus emmus 6. a. The creature has an arch-shaped bottom...broadus plainus b. The creature has an M-shaped bottom...broadus tritops 7. a. The creature has hairy spikes..go to 8 b. The creature has no spikes...go to a. There is a star in the middle of its body...broadus hairystarus b. The is no star in the middle of its body...go to 9 9. a. The creature has an arch shaped bottom...broadus hairyemmus b. The creature has an M shaped bottom...broadus kiferus 10. a. The body is symmetrical...broadus walter b. The body is not symmetrical...broadus anderson 11. a. The creature has no antennae...go to 12 b. The creature has antennae...go to a. There are spikes on the face...narrowus wolfus b. There are no spikes on the face..go to a. The creature has no spike anywhere...narrowus blankus b. There are spikes on the right leg...narrowus starboardus 14. a. The creature has 2 eyes...go to 15 b. The creature has 1 eye...narrowus cyclops 15. a. The creature has a mouth...go to 16 b. The creature has no mouth...go to a. There are spikes on the left leg.narrowus portus b. There are no spikes at all...narrowus plainus 17. a. The creature has spikes...go to 18 b. The creature has no spikes...narrowus georginia 18. a. There are spikes on the head...go to 19 b. There are spikes on the right leg.narrowus montanian 19. a. There are spikes covering the face...narrowus beardus b. There are spikes only on the outside edge of head...narrowus fuzzus V

12 Name Date: Course: Science/Ms. Lopez 57c Homeroom: Exit Slip Dichotomous Keys 1a. 1b. 2a. 2b. 3a. 3b. 4a. 4b. CLASSIFY THE BEANS! Bean round Bean elliptical or oblong Bean white Bean has dark pigments Bean evenly pigmented Bean pigmentation mottled Bean black Bean reddish- brown A Garbanzo bean Go to 2 White northern Go to 3 Go to 4 Pinto bean Black bean Kidney bean B C E