Course: Science/Ms. Lopez Homeroom - Wikispaces2_Lesson+57... · Course: Science/Ms. Lopez...
Transcript of Course: Science/Ms. Lopez Homeroom - Wikispaces2_Lesson+57... · Course: Science/Ms. Lopez...
Name ___________________________ 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.
1) According to the Dichotomous Key above, what teacher are you most like? ____________________________________________________________________________________________________________________________________________________________________________________________________________________
Do you love to be super organized?
Yes
Do you like to swim?
Yes
Have you ever lived in a different country?
Yes
Ms. Brown
No
Ms. Beasley
No
Have you read the entire Twilight
series?
Yes
Mr. Hawkins
No
Ms. Eley
No
Do you like to run?
Yes
Have you ever been on a middle school sports team?
Yes
Ms. Roddey
No
Ms. De Vries
No
Do you know the words to"Cha Cha
Slide"?
Yes
Mr. Siegel
No
Ms. Maqsood
57a
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).
_______________________________ _____________________________ __________________________ _________________________
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
1____________________ 2____________________ 3_____________________ 4____________________
5______________________ 6______________________ 7___________________ 8_______________________
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 11
8. 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
1. _______________________________
2. _______________________________
3. _______________________________
4. _______________________________
5. _______________________________
6. _______________________________
7. _______________________________
8. _______________________________
9. _______________________________
10. _______________________________
11. _______________________________
12. _______________________________
BUTTON FAMILY DICHOTOMOUS KEY
1A Thread shows when button is sewn on (flat button)---------------------------------------Go to 2
1B 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!
Button 1____________________________ Button 2_____________________________
Button 3____________________________ Button 4_____________________________
Button 5____________________________ Button 6_____________________________
Button 7____________________________ Button 8_____________________________
Button 9____________________________ Button 10____________________________
Wacky People Key
3a One leg 6 3b Three or four legs 7
4a Fly-like Mosk Cara 4b Not fly-like 8
5a Seems to be a girl Rita Nita 5b Not a girl 9
6a Leg is curled , two feet Ru-ela.Brella 6b Leg is straight, one foot Giggles
7a Three legs 10 7b Four legs 11
8a Has webbed feet Hex Oculate 8b Clawed feet 12
9a Curly hair, no toes Lugio Wirum 9b Wiggly looking mouth, three toes on feet C. Nile
10a Very long nose, open mouth Elle E. Funk 10b Some other appearance 13
11a Has duck bill, two pinchers Tri D. Duckt 11b No arms or pinchers 14
12a Has ears, tail, and beak Grif Leon 12b Four eyes on stalks Eggur Ondy
13a One eye, webbed feet Cue Kide 13b Four stalked eyes, four pinchers Quadrumenox
14a Three toed feet, nose like a flower Tunia petalos 14b Spider-like, has spots Patterned mulywumpus
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Wacky People Dichotomous Key Lab 2A
Instructions on how to use the key:
The purpose of using the key is to name the creature shown. Stick with one character until the name is reached, then go to the next.
x� A dichotomous key gives instructions in pairs of statements. x� With each character, start with the first pair of statements. x� Decide which description describes your chosen character best and follow the line to the right. x� There will either be a number or a name. If it is a number, go to the pair of steps with that
number, for example, if the number is 3, go to steps 3a and 3b. x� If the line ends in a name you have identified your character, so write it down by the creature. x� Continue until each creature has a name. There is only one creature per name, and no creature
has two names.
Wacky�People
Wacky People Key 1a Two feet 2 1b Some other number of feet 3
2a Does not look at all human 4 2b Looks a lot like a human 5
Name: _____________________________________ Class: ____ Date: ______
7th Life Science Lab 2A
Wacky People Dichotomous Key Lab Answer Sheet
1
2
3
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5 6
7 8 9
10 11 12
13 14 15
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Dichotomous Key for Triangle Creatures 1. A. Sides are straight lines Go to 2 B. Sides are wavy lines Go to 10 2. 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 12 5. 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 9. 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
Answer Key #101 ________________________ _______________________________ #102 _______________________ _______________________________ #103 _______________________ _______________________________ #104 _______________________ _______________________________ #105 _______________________ _______________________________ #106 _______________________ _______________________________ #107 _______________________ _______________________________ #108 _______________________ _______________________________ #109 _______________________ _______________________________ #110 _______________________ _______________________________ #111 _______________________ _______________________________ #112 _______________________ _______________________________ #113 _______________________ _______________________________
Name ___________________________ Date: ___________________
Dichotomous Key to Pamishan Creatures: 1. a. The creature has a large wide head..go to 2
b. The creature has a small narrow head...........go to 11
2. 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 10
8. 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 14
12. a. There are spikes on the face ...Narrowus wolfus
b. There are no spikes on the face ..go to 13
13. 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 17
16. 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
C D E F G
H I J K L
M N O P Q
R S T U V
57b
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!
Name ___________________________ Date: ___________________ Course: Science/Ms. Lopez Homeroom:
Exit Slip – Dichotomous Keys
CLASSIFY THE BEANS!
1a. Bean round Garbanzo bean 1b. Bean elliptical or oblong Go to 2
2a. Bean white White northern 2b. Bean has dark pigments Go to 3
3a. Bean evenly pigmented Go to 4 3b. Bean pigmentation mottled Pinto bean
4a. Bean black Black bean 4b. Bean reddish-‐brown Kidney bean
A B C
E
57c
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