STRUCTURES OF LIFEInvestigation 3 Part 1 Investigation 3

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STRUCTURES OF LIFE—Investigation 3, Part 1 Investigation 3: Meet the Crayfish Part 1: Crayfish

STRUCTURES OF LIFE—Investigation 3, Part 1 Investigation 3: Meet the Crayfish Part 1: Crayfish Structures Complete Teacher Notes

Investigation 3, Part 1 Meet the Crayfish Observe the crayfish. Don't touch them yet.

Investigation 3, Part 1 Meet the Crayfish Observe the crayfish. Don't touch them yet. Time What interesting parts do you observe on your crayfish? • IG pg. 198, Steps 1– 3

Investigation 3, Part 1 Focus Question What are the structures of a crayfish? Time

Investigation 3, Part 1 Focus Question What are the structures of a crayfish? Time IG pg. 198, Step 4

Investigation 3, Part 1 Crayfish Structures 1. Do crayfish have eyes? How many? 2.

Investigation 3, Part 1 Crayfish Structures 1. Do crayfish have eyes? How many? 2. Do crayfish have ears? How many? 3. Do crayfish have walking legs? How many? 4. Do crayfish have antennae? How many? 5. Do crayfish have tail flaps? How many? 6. Do crayfish have pincers? How many? IG pg. 199, Steps 5– 6

Investigation 3, Part 1 Crayfish Structures 7. Do crayfish legs have joints? 8. Do

Investigation 3, Part 1 Crayfish Structures 7. Do crayfish legs have joints? 8. Do crayfish have mouthparts? 9. Do crayfish have tail joints? 10. Do crayfish have bristles? 11. Does the crayfish have bumps and points? 12. What other crayfish structures did you observe? How many? Where? • Each of the structures you observed is useful to the crayfish in some way. Each structure has a function in the crayfish's life. A function is the action or purpose of a structure. IG pg. 199, Step 6

Investigation 3, Part 1 Crayfish Structure and Function Structure Function IG pg. 199– 200,

Investigation 3, Part 1 Crayfish Structure and Function Structure Function IG pg. 199– 200, Step 7

Investigation 3, Part 1 Female and Male Crayfish female long antenna short antenna pincer

Investigation 3, Part 1 Female and Male Crayfish female long antenna short antenna pincer eye mouth walking leg male carapace egg pore short swimmeret long swimmeret modified swimmeret IG pg. 200– 201, Steps 8– 9

Investigation 3, Part 1 Crayfish Needs Crayfish belong to a class of animals called

Investigation 3, Part 1 Crayfish Needs Crayfish belong to a class of animals called crustaceans. What do we need to know about crayfish in order to keep them here in our classroom? • IG pg. 201, Step 10

Investigation 3, Part 1 Crayfish Habitat and Care The place where an animal lives

Investigation 3, Part 1 Crayfish Habitat and Care The place where an animal lives is its habitat. We will use these bus trays as crayfish habitats. • Keep the water cool (no direct sunlight). Keep the water clean. • Provide plants as a food source • all the time. • Use additional basins for feeding with goldfish food or cat food. IG pg. 201– 202, Steps 11– 12

Investigation 3, Part 1 Crayfish Habitat and Log Set up two crayfish habitats for

Investigation 3, Part 1 Crayfish Habitat and Log Set up two crayfish habitats for the class. Materials: 1 bus tray 4 crayfish houses aged water Elodea (food) gravel • • • Procedure: 1. Spread some gravel on the bottom of the bus tray. 2. Pour aged water into the tray until it is 4 -6 cm deep. 3. Put some Elodea into the habitat. 4. Put four crayfish houses into the habitat. 5. Introduce four crayfish into the habitat. Do not put rocks or any objects near the sides of the tray. The crayfish might climb out if you do. IG pg. 202– 203, Steps 13– 16

Investigation 3, Part 1 Clean Up! • Recycle any remaining water by watering some

Investigation 3, Part 1 Clean Up! • Recycle any remaining water by watering some plants. • Rinse and dry the remaining six basins. IG pg. 203, Step 17

Investigation 3, Part 1 Vocabulary Review crayfish carapace antenna a freshwater animal that has

Investigation 3, Part 1 Vocabulary Review crayfish carapace antenna a freshwater animal that has a hard shell and prominent pincers a hard outer shell that covers the main part of the body of an animal the thin feeler on the head of an animal like a crayfish, an isopod, or an insect pincer an animal's claw used for grasping predator an animal that hunts and catches other animals for food leg and mouth parts appendage IG pg. 203, Steps 18– 19

Investigation 3, Part 1 Vocabulary Review female the sex that can bear offspring or

Investigation 3, Part 1 Vocabulary Review female the sex that can bear offspring or lay eggs male the sex that fertilizes female reproductive cells (e. g. , eggs) swimmeret a small, soft leg under the tail of a crayfish crustacean a class of mostly aquatic animals with hard, flexible shells habitat the place where an animal lives IG pg. 203, Steps 18– 19

Investigation 3, Part 1 Vocabulary Review omnivore an animal that eats both animals and

Investigation 3, Part 1 Vocabulary Review omnivore an animal that eats both animals and plants herbivore an animal that eats only plants or algae carnivore an animal that eats only animals Elodea a freshwater aquatic plant that crayfish eat molt to shed an outer shell in order to grow IG pg. 203, Steps 18– 19

Investigation 3, Part 1 Reading in Science Resources Investigation 3: Meet the Crayfish ………….

Investigation 3, Part 1 Reading in Science Resources Investigation 3: Meet the Crayfish …………. . …………… 34 Adaptations …………. . ………………… 42 Life on Earth …………. . . ……………… 50 Inside a Snail’s Shell ………… 64 A Change in the Environment ………………. …… 66 Food Chains …………………. . ………… 70 IG pg. 204– 206, Steps 20– 24

Investigation 3, Part 1 Wrap-Up/Warm-Up What are the structures of a crayfish? Pair up

Investigation 3, Part 1 Wrap-Up/Warm-Up What are the structures of a crayfish? Pair up with a partner to • review the list of three structures you selected to write about; • share the function of each structure. IG pg. 207, Step 25

Investigation 3, Part 1 Structures of Life FOSS Program Overview

Investigation 3, Part 1 Structures of Life FOSS Program Overview