Presentation on theme: "Structures of Life Crayfish"— Presentation transcript:
1Structures of Life Crayfish FOSS Structures of Life, TESLA Science Notebooks
2Big Idea:All living organisms have identifiable structures and characteristics that serve different functions in growth, survival, and reproduction.
3Guiding Questions What are the structures of crayfish? What does a crayfish need to survive?What are observable crayfish behaviors?
4Engaging ScenarioThe scientists at TESLA are very pleased with the information we have learned so far about seeds and plants. They were excited to hear that we were able to grow plants with out planting them in soil. Now they would like for you to work on a new project for them. They would like you to investigate the structures and behaviors of crayfish. Crayfish are a type of living organism which are very different than plants. Crayfish are part of a family of living organisms called crustaceans.The TESLA scientists have sent us some materials and printed information that may help us. They also need us to keep accurate records and labeled drawings in our science notebooks so we can share what we learned about the structures and behaviors of crayfish.What do we need to investigate? What is the problem that needs to be solved?
6Background KnowledgeSome of us may have never seen a crayfish up close before so lets take a couple of minutes to make a few observations.Crayfish are a living organism so we need to treat them with respect. They will not harm you, but they can pinch you if not handled correctly.For now we are just going to observe the crayfish and not handle them.
7Focus Question: What are the structures and behaviors of crayfish? “Discuss with your group what we need to investigate and record it as the FOCUS QUESTION. This is the problem we are going to investigate and solve.”What are the structures and behaviors of crayfish?
8Prediction: Prediction: Now that we have a focus question, discuss with your group what you think a possible answer might be. Record your prediction in your scientist notebook and be ready to share your ideas with the class.Prediction:I think that the structures of a crayfish are________________________because ___________________________________________________I think that the behaviors of a crayfish are________________________
9Part I: StructuresToday we are going to begin by examining our crayfish to learn more about them. It is OK for crayfish to be out of the water for a short period of time. We don’t want to keep them out of the water so long that they dry out. It would also be bad for the crayfish if we drop them on a hard surface.This is the best way to pick up a crayfish.You can also use a spoon and ¼ liter container if you don’t want to touch one.
10Part I: StructuresWhat are some of the interesting parts that you notice on your crayfish?Parts of the crayfish are their structures. Just like the parts of the plants and seeds are called structures.We are going to keep a list of the structures that we observe in our science notebooks.
11Part I: Structures Crayfish Structures Do crayfish have… Yes or No How many…Do crayfish have eyes?How many?Do crayfish have ears?Do crayfish have walking legs?Do crayfish have antennae?Do crayfish have tail flaps?How many parts?Do crayfish have pincers?Do crayfish have joints?Do crayfish have mouths?Do crayfish tails bend?How many places?Do crayfish have bristles?Where?Do crayfish have bumps?What other crayfish structures do you observe?
12Can you predict the gender of your crayfish? Part I: StructuresSome of you were able to notice differences in your crayfish. They were not all the same. Some of these differences may be due to age or handicapping… Loss of an antennae or leg.What else could cause noticeable differences in our crayfish?Gender: Male and female crayfish will have different structuresWe can compare what we saw with our crayfish diagram and identify these different structures.Can you predict the gender of your crayfish?
13Part I: Structures Long antennae Short antenna Pincer Eye Mouth Walking legCarapaceShort swimmeretModified swimmeretEgg poreLong swimmeretFemale CrayfishMale Crayfish
15Part I: StructuresHow can you tell the difference between a male and female crayfish?Male CrayfishFemale CrayfishFirst pair of swimmerets is modifiedBigger pincersSmaller pincersNarrower talesWider tailsNo egg poresEgg poresShorter swimmeretsLonger swimmerets
16Part II: Habitat Most living organisms require a certain amount of: What do we need to know about crayfish in order to keep them in our classroom?Most living organisms require a certain amount of:Food… What will they eat, how much, how often?Water… How deep, what temperature, how clean?Shelter… Do they need hiding places or rocks?Air… How will they get air to breath?Space… Should they live together?
17Part II: Habitat Habitat The place where an animal lives is called a habitat. In our classroom the crayfishes habitat will be these large tubs.HabitatNatural HabitatClassroom HabitatIn their natural habitat, crayfish find their own food and shelter. In our classroom, they must be fed and given a safe place to live.
18Draw and Label your Habitat Part II: HabitatIt will be your groups responsibility to care for the crayfish habitat and make observations.Our crayfish will eat elodea and cat foodCrayfish will be fed cat food in a separate basinThe plastic cups are crayfish shelterDraw and Label your HabitatClassroom Habitat
19What do they do? How do they behave? Part III: BehaviorsWhen we observe what crayfish “do,” we are observing their behaviors.BehaviorsRemember… The scientists from TESLA want us to send them information about the structures and behaviors of crayfish. We have already learned some details about crayfish structures that we could share. To learn more about what crayfish do, we need to observe them over the next few weeks.Let’s begin by observing the crayfish when they are removed from their habitat and placed in a basin.What do they do? How do they behave?Record your observations in your science notebook and be prepared to share what your group observed with the rest of the class.
20Crayfish use their houses for shelter Part III: BehaviorsCrayfish SheltersHow have you observed crayfish using their houses in the classroom habitat?Crayfish use their houses for shelterDo all crayfish hide in houses?Does each crayfish have its own house that it always goes into?Do you ever see more than one crayfish hide in the same house?
21Part III: BehaviorsThis week your groups task is to set-up an investigation to find out how your crayfish use their houses. You will need to think of a way to collect data so you can share your findings with the rest of the class and the TESLA scientists.Your plan must include these elements:Specific locations of the housesA way to Identify each individual crayfishLocation of the crayfish during the observation
22Part III: Behaviors Collecting Data: Your observations should be recorded in your scientist notebook.Identify the Date and Time of each observation.Include detailed drawings with labels.
23Part III: Behaviors Crayfish Shelters What did you learn from your investigation about crayfish behaviors and their use of shelters?Do crayfish like to share their shelter with other crayfish?Will they defend their shelter or place in their habitat?How do you Know?Crayfish are territorial creatures. They will claim a location in their habitat and defend it against others. The biggest or strongest crayfish will normally claim the territory of its choice.
24Making Meaning What are some of the observable structures of crayfish? What does a crayfish need for a healthy habitat?What are some of the behaviors you observed?How are crayfish territorial?
25Claims and Evidence: I claim that… I know this because… Based on what you have learned from your investigation of crayfish, you need to record some claims and evidence statements in your science notebook… Your evidence must be based on your data and observations!I claim that… I know this because…Possible Examples:I claim that crayfish have observable structures.I know this because…I claim that crayfish need _______________________________to survive.I claim that crayfish have behaviors that are observable.
26Reflection and Conclusion 201111/8What did you learn…?What really surprised you…?What new questions do you have…?What would you like to know more about…?