Ecosystems Pacing Guide Use the information below to assist you in determining the amount of time needed to complete the entire unit. These recommendations assume the average science class period is 50 to 60 minutes in length. We recommend teaching science a minimum of three sessions per week in order to maintain consistency and keep students engaged. Many teachers accomplish this by rotating a science unit with a social studies unit, enabling you to teach more science sessions in one week and finish the unit in fewer weeks. We highly recommend that all teachers participate in the Expository Writing and Science Notebooks Program in order to further develop students' science understandings, as well as their scientific thinking and writing skills. To implement the science-writing curriculum requires, for most lessons, a separate 20 to 30 minutes for a science-writing mini-lesson and independent writing time. Time for these mini-lessons are not included in this pacing guide. Lessons and Common Assessments (see corresponding lesson in Instructional Guide (IG) for lesson planning) Lesson 1: Thinking About Ecosystems Students share prior knowledge about the relationships between living things and the nonliving things in the environment, while viewing a visual aid. Recommended Number of Periods 1-2 Standards Addressed/Concept(s) of the Lesson Students will be beginning to develop understanding of the following standard. 4-5LS2A: An ecosystem includes all of the plant and animal populations and nonliving resources in a given area. Plants and animals depend on one another and the nonliving resources in their ecosystem to help them survive. PE: Identify the living and nonliving parts of an ecosystem. Give examples to show how the plants and animals depend on one another for survival. June2012 Considerations for Planning Students are just beginning to think about the parts of an ecosystem in this lesson. They will construct a definition for ecosystem after observing their model ecosystems in Lesson 4. The organisms will arrive to all teachers on one date. Refer to the yellow pages at the beginning of the instructional guide (IG) for instructions in caring for these organisms. Place them in holding tanks until you are ready to place them in the student models. Recommended Applications and Extensions Take students into the schoolyard to observe relationships between living things and between living and nonliving things in the environment. Groups collect dead leaves & 1 twig with lichen on it to add to terrariums they will build in the next lesson. Lesson 2: Setting Up the Terrarium Students plan a controlled experiment as a class, identifying the 3 types of variables, then construct model terrariums to collect and record data. Students make and record observations of change in the terrariums over time. Lesson 3: Setting Up the Aquarium Students construct model aquariums; observe, draw, read about, and take notes about 3 producers, which are added to the aquariums. Students make and record observations of change in the aquariums over time. 2 4 4-5INQB: Scientists plan and conduct different kinds of investigations, one of which is a controlled experiment. 4-5INQC: An experiment involves a comparison. For an experiment to be valid and fair, all of the things that can possibly change the outcome of the experiment should be kept the same, if possible. 4-5INQF: A scientific model is a simplified representation of an object, event, system, or process created to understand some aspect of the natural world. PE: Create a simple model to represent an event, system, or process. Use the model to learn something about the event, system, or process. 4-5SYSC: Systems have inputs and outputs. Changes in inputs may change the outputs of a system. 4-5LS1C: Certain structures and behaviors enable plants and animals to respond to changes in their environment. 4-5LS2B: Plants make their own food using energy from the sun. . . PE: Explain that plants make their own food. 4-5PS3A: Energy has many forms, such as heat, light, sound, motion, and electricity. PE: Identify different forms of energy (e.g., heat, light, sound, motion, electricity) in a given system. 4-5PS3B: Energy can be transferred from one place to another. PE: Draw and label diagrams showing several ways that energy can be transferred from one place to another (e.g., light energy through space, [light energy from the sun to plant leaves]). June2012 This longer, modified lesson includes planning and conducting a controlled experiment. This is excellent practice for the controlled experiment students plan and conduct in Lessons 10-14, as well as effective practice for the science MSP. Follow the IG. Follow the yellow plant & animal care sheets at the beginning of the IG. Language Arts integration: nonfiction reading and notetaking in the context of science – find reading selection on pgs. 55-58 in teacher manual (pgs.31-34 in binder version of manual) Modified lesson includes constructing understanding of a producer as a system with interrelated parts, with inputs and outputs of matter and energy. Follow the IG. Lesson 4: Adding Animals to the Aquarium Students observe, draw, read, take notes and write about 2 consumers (fish and snails), which are added to the aquariums. Observations are recorded over time. 2-3 4-5SYSC: Systems have inputs and outputs. Changes in inputs may change the outputs of a system. 4-5LS2B: Plants make their own food using energy from the sun. Animals get food by eating plants and/or other animals that eat plants. Plants make it possible for animals to use the energy of sunlight. 4-5LS1B: Each animal has different structures and behaviors that serve different functions. PE: List parts of an animal’s body and describe how it helps the animal meet its basic needs (e.g., the bones support the body so it can move; [crickets’ back legs allow them to jump high]). 4-5LS2A: An ecosystem includes all of the plant and animal populations and nonliving resources in a given area. 4-5PS3A: Energy has many forms, such as heat, light, sound, motion, and electricity. 4-5PS3B: Energy can be transferred from one place to another. PE: Draw and label diagrams showing several way that energy can be transferred from one place to another. June2012 Language Arts integration: nonfiction reading and notetaking in the context of science – find reading selections on pg. 72 of manual (pg. 41 in binder) and pg. 50 of instructional guide (IG) Use the multiple copies of the Ecosystems book, which comes with the kit, to read pgs. 6-10, “What is an Ecosystem?” and “Eco Words”. Modified lesson includes constructing understanding of a consumer as a system with interrelated parts, with inputs and outputs of matter and energy. Follow the IG. Lesson 5: Observing the Completed Aquarium Students create a tree map to explain the relationships between living and nonliving components in an ecosystem. Students identify dependent and interdependent relationships between living and nonliving things. 2 4-5SYSA: Systems contain subsystems. PE: Identify at least one of the subsystems of an object, plant, or animal (e.g., an airplane contains subsystems for propulsion, landing, and control; [an ecosystem contain subsystems, (e.g., producers and consumers)]. 4-5SYSB: A system can do things that none of its subsystems can do by themselves. PE: Specify how a system can do things that none of its subsystems can do by themselves (e.g., a forest ecosystem can sustain itself, while the trees, soil, plant, and animal populations cannot, [a model pond ecosystem can sustain itself, while the duckweed, fish, snails, and water cannot]). 4-5SYSC: Systems have inputs and outputs. Changes in inputs may change the outputs of a system. PE: Describe what goes into a system (input) and what comes out of a system (output). 4-5LS2A: An ecosystem includes all of the plant and animal populations and nonliving resources in a given area. Plants and animals depend on one another and the nonliving resources in their ecosystem to help them survive. PE: Identify the living and nonliving parts of an ecosystem. June2012 Language Arts integration: nonfiction reading and note-taking in the context of science – find reading selection on pg. 82 of manual (pg. 58 in binder). Modified lesson includes constructing understanding of the model aquarium as an ecosystem with interrelated parts, with inputs and outputs of matter and energy. Follow the IG. Lesson 6: Adding Animals to the Terrarium Students analyze data from the controlled investigation in lesson 2, then observe, draw, read about, take notes and write about 2 consumers (isopods and crickets) before adding them to the terrariums. 2 4-5SYSA: Systems contain subsystems. PE: Identify at least one of the subsystems of an object, plant, or animal (e.g., an airplane contains subsystems for propulsion, landing, and control; [an ecosystem contain subsystems, (e.g., producers and consumers)]. 4-5SYSB: A system can do things that none of its subsystems can do by themselves. PE: Specify how a system can do things that none of its subsystems can do by themselves (e.g., a forest ecosystem can sustain itself, while the trees, soil, plant, and animal populations cannot, [a model terrestrial ecosystem can sustain itself, while the soil, plant and animal populations cannot]). 4-5SYSC: Systems have inputs and outputs. Changes in inputs may change the outputs of a system. PE: Describe what goes into a system (input) and what comes out of a system (output). 4-5LS2A: An ecosystem includes all of the plant and animal populations and nonliving resources in a given area. Plants and animals depend on one another and the nonliving resources in their ecosystem to help them survive. PE: Identify the living and nonliving parts of an ecosystem. 4-5LS1D: Plant and animals have structures and behaviors that respond to internal needs. PE: Give examples of how plants and animals respond to internal needs (e.g., plants wilt when they don’t have water; animals seek food when they are hungry). 4-5LS3B: Plants and animals inherit many characteristics from their parents. Some inherited characteristics allow organisms to better survive and reproduce in a given ecosystem. 4-5LS3C: Some characteristics and behaviors result from an individual plant’s or animal’s interactions with the environment and are not passed form one generation to the next by heredity. June2012 Language Arts integration: nonfiction reading and notetaking in the context of science – find reading selections on pg. 92-94 in manual (pg. 68-70 in binder). Use the multiple copies of the Ecosystems book, which comes with the kit, to read pgs. 11-19, “Generalists and Specialists”, “What Eats What?” and “Dead and Done?” Modified lesson includes constructing understanding of the model terrarium as an ecosystem with interrelated parts, with inputs and outputs of matter and energy. Assessment A: Interactions: Dependencies and Interdependencies 1 4-5LS2A: An ecosystem includes all of the plant and animal populations and nonliving resources in a given area. Plants and animals depend on one another and the nonliving resources in their ecosystem to help them survive. PE: Identify the living and nonliving parts of an ecosystem. Give examples to show how the plants and animals depend on one another for survival. Describe how the plants and animals in an ecosystem depend on nonliving resources. June2012 Lesson 7: Joining the Terrarium and Aquarium Students join both models to create a watershed model, in which they observe runoff draining from the terrarium model into the aquarium model. Students construct understanding of how energy flows through a food chain and make inferences about the results of one type of organism, such as producers, dying out on the rest of the food chain. 1-2 4-5SYSD: One defective part can cause a subsystem to malfunction, which in turn will affect the system as a whole. PE: Predict what might happen to a system if a part in one or more of its subsystems is missing, broken, worn out (e.g., a broken toe will affect the skeletal system, which can greatly reduce a person’s ability to walk; [the decline in an ecosystem of producers will affect the survival of consumers]). 4-5LS2C: Plants and animals are related in food webs with producers, consumers, and decomposers that break down wastes and dead organisms, and return nutrients to the soil. PE: Draw a simple food web given a list of three common organisms. Draw arrows properly and identify the producers and consumers. Compare the roles of producers, consumers, and decomposers in an ecosystem. 4-5LS2D: Ecosystems can change slowly or rapidly. Big changes over a short period of time can have a major impact on the ecosystem. PE: Apply knowledge of a plant or animal’s relationship to its ecosystem and to other plants and animals to predict whether and how a slow or rapid change in the ecosystem might affect the population of that plant or animal, (e.g., the decline in producers affects the survival of consumers; introducing a nonnative plant or animal into an ecosystem may reduce the populations of native species). 4-5ES2D: Soils are formed by weathering and erosion, decay of plant matter, settling of volcanic ash, transport by rain through streams and rivers, and deposition of sediments. PE: Explain how the formation of soils is related to. . . decay of plant matter. . .[e.g., decaying plant matter becomes humus, which contains mineral nutrients used by producers]. June2012 Language Arts integration: nonfiction reading in the context of science – find reading selection on pg. 78-B of the IG. Use the multiple copies of the Ecosystems book to read pgs. 28-30, “Snakes Rule”, which tells about the results of introducing a new organism into an ecosystem in Guam. Modified lesson includes constructing understanding of the watershed model as an ecosystem with interrelated parts, with inputs and outputs of matter and energy. Follow the IG. Application Lesson: Comparing Terrarium Model to Terrestrial Ecosystem Outdoors Students go into the school yard or nearby park to record producers, consumers and abiotic environmental components observed in the real world ecosystem. Then they compare and contrast their model terrarium ecosystems with the real world terrestrial ecosystem. Assessment B: Aquarium Food Chain Wheel 1-2 1 4-5LS2B: Plants make their own food using energy from the sun. Animals get food by eating plants and/or other animals that eat plants. Plants make it possible for animals to use the energy of sunlight. PE: Explain that plants make their own food, and animals, including humans, get food by eating plants and/or eating animals. 4-5INQF: A scientific model is a simplified representation of an object, event, system, or process created to understand some aspect of the natural world. PE: Explain how the model is similar to and different from the thing being modeled. 4-5LS2C: Plants and animals are related in food webs with producers, consumers, and decomposers that break down wastes and dead organisms, and return nutrients to the soil. PE: Compare the roles of producers, consumers, and decomposers in an ecosystem. June2012 This real world connection of the terrarium model to the ecosystem outside on or near the school grounds should ideally be taught after Lesson 7. Lesson 8: Upsetting the Stability Students describe their model ecosystems as stable or disturbed and differentiate between natural disturbances, such as birth/death, and human-induced disturbances, such as pollutants. Students read about human disturbances to real world ecosystems. Lesson 9: Reporting on Pollutants Students communicate information they read about pollutants to the class. 1 4-5LS2E: All plants and animals change the ecosystem where they live. If this change reduces another organism’s access to resources, that organism may move to another location or die. PE: Describe how one population may affect other plants and/or animals in the ecosystem (e.g., increase in Scotch Broom replaces native plants normally eaten by butterfly caterpillars, reducing the butterfly population, [increase in algae blocks sunlight needed by other aquatic organisms]. 4-5LS2F: People affect ecosystems both positively and negatively. PE: Describe ways that humans can improve the health of ecosystems (e.g., recycling wastes, establishing rain gardens, planting native species to prevent flooding and erosion, [limiting fertilizer and road salt runoff, using cars less to lessen air pollution and acid rain]). 4-5SYSC: Systems have inputs and outputs. Changes in inputs may change the outputs of a system. PE: Describe the effect on a system if its input is changed (e.g., if sugar is left out, the cookies will not taste very good; [pollutants entering an ecosystem negatively affect the survival of the organisms in the system]). Same as Lesson 8 above Language Arts integration: nonfiction reading - Read Seattle Times article found on pg. 93-B in IG. 1-2 June2012 Language Arts integration: nonfiction reading and creation of flow maps to illustrate cause and effect – find reading selections on pgs. 112-116 in manual (pgs. 88-92 in binder) Language Arts integration: nonfiction reading - Use the multiple copies of the Ecosystems book to read pgs. 40-42, “Something’s in the Air”. Follow the IG for this modified lesson. Lesson 10: Planning Pollution Experiments 1-2 Students plan controlled experiments to learn about the effects of pollution on their watershed models. They determine variables and controls. Lesson 11: Setting Up Our Pollution Experiments 4-5INQA Question: Scientific investigations involve asking and answering questions and comparing the answers with evidence from the real world. 4-5INQB Investigate: Scientists plan and conduct different kinds of investigations, one of which is a controlled experiment. PE: Work collaboratively with other students to carry out an investigation. 4-5INQC Investigate: An experiment involves a comparison. For an experiment to be valid and fair, all of the things that can possibly change the outcome of the experiment should be kept the same, if possible. 4-5INQD Investigate: Investigations involve systematic collection and recording of relevant observations and data. 4-5 INQE Investigate: Repeated trials are necessary for reliability. 4-5APPH People of all ages, interests, and abilities engage in a variety of scientific & technological work. PE: Describe several careers that require people to apply their knowledge of science. Same as Lesson 10 above 1+ Students conduct their experiment plans and begin a data-collection system. June2012 Language Arts integration: nonfiction reading – Use the multiple copies of the Ecosystems book to read “Rachel Carson’s Silent Spring” on pgs. 60-61. Plan to use the reading selection as a context to discuss careers students may be interested in and how scientific knowledge of ecosystems and pollutants would be useful in specific careers. This lesson is spread over several weeks. One period is needed for students to set up pollution investigation, then a shorter period every few days to continue polluting and to make observations. Lessons 15-16: Examining a Real Environmental Problem: A Look at Trade-Offs 2-3 Students analyze environment problems of the Puget Sound Ecosystem from different points of view, identify possible solutions and trade-offs. Assessment C: Understanding Human Impacts 1 4-5LS2F: People affect ecosystems both positively and negatively. PE: Describe ways that humans can improve the health of ecosystems (e.g., recycling wastes, establishing rain gardens, planting native species to prevent flooding and erosion, [limiting fertilizer and road salt runoff, using cars less often to lessen air pollution]). 4-5LS2A: An ecosystem includes all of the plant and animal populations and nonliving resources in a given area. Plants and animals depend on one another and the nonliving resources in their ecosystem to help them survive. PE: Identify the living and nonliving parts of an ecosystem. Give examples to show how the plants and animals depend on one another for survival. 4-5LS2F: People affect ecosystems both positively and negatively. PE: Describe ways that humans can improve the health of ecosystems (e.g., recycling wastes, establishing rain gardens, planting native species to prevent flooding and erosion, [limiting fertilizer and road salt runoff, using cars less to lessen air pollution and acid rain]). June2012 A minimum of 2 weeks is needed between Lessons 11 and 12. This is an ideal time to do Lessons 15-16, which are real world applications of conceptual understandings learned in the unit to the Puget Sound Ecosystem. It is ideal if you can keep the pollution experiments going for 3-4 months. Students will be able to observe the effects of the pollution much more readily. This can be done even after you send the kit back to the SMC, because the plastic bottles containing the watershed models do not need to be returned. Lang. Arts and Social Studies integration: Use the multiple copies of the Puget Sound reading and citizen perspectives, which come in the kit, to aid students in researching and roleplaying various perspectives re/Puget Sound environmental issues. Use the multiple copies of the Ecosystems book to read pgs. 35-37, “Tale of the Cod”. Compare to overfishing of salmon. Lesson 11.5: Solving a Problem in the School Yard Ecosystem Students use the technological design process to solve the problem of attracting more wildlife into the school yard. Format and structure of the student task mirrors a science MSP Application item. 2 4-5APPC: Problems of moderate complexity can be solved using the technological design process. This process begins by defining and researching the problem to be solved. PEs: Define a problem and list several criteria for a successful solution. Research the problem to better understand the need and to see how others have solved similar problems. 4-5APPD: Scientists and engineers often work in teams with other individuals to generate different ideas for solving a problem. PEs: Work with other students to generate possible solutions to a problem and agree on the most promising solution based on how well each different idea meets the criteria for a successful solution. 4-5APPE: Possible solutions should be tested to see if they solve the problem. PEs: Use suitable tools, techniques, and materials to make a drawing or build a model or prototype of the proposed design. Test the solution to see how well that solution solves the problem. Modify the design, if necessary. 4-5APPF: Solutions to problems must be communicated, if the problem is to be solved. 4-5LS2F: People affect ecosystems both positively and negatively. June2012 Language Arts integration: nonfiction reading - Use the multiple copies of the Ecosystems book to read pgs. 49-51, “Wildlife-Friendly Yard”. Lesson 12: Observing Early Effects of Pollution Students observe, record, and analyze the early effects of pollution on their models by comparing to a control. Lesson 13: Where Do the Pollutants Go? Students make final observations, collect, and review data. They use data to draw and support conclusions. 1 1 4-5INQC Investigate: An experiment involves a comparison. For an experiment to be valid and fair, all of the things that can possibly change the outcome of the experiment should be kept the same, if possible. 4-5INQI Intellectual Honesty: Scientists report the results of their investigations honestly, even when those results show their predictions were wrong or when they cannot explain the results. PE: Explain why records of observations must never be changed, even when the observations do not match expectations. 4-5APPH People of all ages, interests, and abilities engage in a variety of scientific & technological work. PE: Describe several careers that require people to apply their knowledge of science. 4-5SYSC: Systems have inputs and outputs. Changes in inputs may change the outputs of a system. PE: Describe the effect on a system if its input is changed (e.g., if sugar is left out, the cookies will not taste very good; [pollutants entering an ecosystem negatively affect the survival of the organisms in the system]). 4-5LS1C: Certain structures and behaviors enable plants and animals to respond to changes in their environment. PE: Give examples of how plants and animals respond to their environment [plants turn brown when exposed to acid rain; plants and algae increase when exposed to excess fertilizer runoff (minerals nutrients), then decrease when nutrients are consumed]. 4-5APPH People of all ages, interests, and abilities engage in a variety of scientific & technological work. PE: Describe several careers that require people to apply their knowledge of science. June2012 Language Arts integration: nonfiction reading - Use the multiple copies of the Ecosystems book to read pgs. 45-48, “Growing Crops the Natural Way” and pgs. 26-27, “Hot Enough for You?” (global warming). Plan to use the reading selection as a context to discuss careers students may be interested in and how scientific knowledge of ecosystems and pollutants would be useful in specific careers. Language Arts integration: nonfiction reading - Use the multiple copies of the Ecosystems book to read pgs. 57-59, “Preserving the Wilderness: John Muir”. Plan to use the reading selection as a context to discuss careers students may be interested in and the types of scientific knowledge that would be useful in these careers. Lesson 14: Drawing Conclusions About Our Experiment Students pool and analyze data, examine it for discrepancies, and draws conclusions. 1-2 Assessment D: Interpreting Pollution Experiments Assessment E: What Is Your Point of View? 1 4-5INQG Explain: Scientific explanations emphasize evidence, have logically consistent arguments, and use known scientific principles, models, and theories. PE: Generate a conclusion from a scientific investigation and show how the conclusion is supported by evidence and other scientific principles. 4-5INQH Communicate: Scientists communicate the results of their investigations verbally and in writing. They review and ask questions about the results of other scientists’ work. PE: Display the findings of an investigation using tables, graphs, or other visual means to represent the data accurately and meaningfully. Communicate to peers the purpose, procedure, results, and conclusions of an investigation. Discuss differences in findings and conclusions reported by other students. 4-5SYSD: One defective part can cause a subsystem to malfunction, which in turn will affect the system as a whole. PE: Predict what might happen to a system if a part in one or more of its subsystems is missing (e.g., a broken toe will affect the skeletal system, which can greatly reduce a person’s ability to walk; [the decline of producers in an ecosystem will negatively affect the survival of consumers]). 2-3LS2C: Some changes in ecosystems occur slowly and others occur rapidly. Changes can affect life forms, including humans. PE: Explain the consequences of gradual ecosystem change (e.g., gradual increase or decrease in daily temperatures, reduction or increase in yearly rainfall; [gradual increase in pollutants entering an ecosystem]). 4-5LS2F: People affect ecosystems both positively and negatively. PE: Describe ways that humans can improve the health of ecosystems (e.g., recycling wastes, establishing rain gardens, planting native species to prevent flooding and erosion, [reusing materials instead of using disposable products]). June2012 This lesson has been modified to include guidelines for modeling how to write a basic conclusion, a requirement for proficiency on the state science assessment. May be implemented at the end of Lesson 14 Optional Extension: Ecosystems Field Study in the Schoolyard in partnership with Homewaters Project/Islandwood. Students plan, conduct, and report on a field study outdoors. Teachers must attend a 3hour class in order to receive the lesson plans and support from Homewaters/Islandwood with this field study. 3-4 4-5INQB Investigate: Scientists plan and conduct different kinds of investigations, one of which is a field study. PE: Work collaboratively with other students to carry out a field study. 4-5LS2F: People affect ecosystems both positively and negatively. PE: Describe ways that humans can improve the health of ecosystems (e.g., recycling wastes, establishing rain gardens, planting native species to prevent flooding and erosion). June2012 Homewaters Project/Islandwood personnel provide support with planning and conducting this field study in your schoolyard. This field study is similar to scenarios students may confront on the science MSP. Contact Homewaters for inclusion in this Ecosystems Field Study. (Homewaters@island wood.org 206-8557070)