Unit 4: Ecosystems
Lesson 1:Ecosystems- An Introduction
5E Lesson Planning:
I plan most of my science lessons using the BSCS 5E Lesson Model: Engage, Explore, Explain, Elaborate, and Evaluate.For a quick overview of the model, take a look at this video.
I use this lesson model because it peaks the students' interest in the beginning during the "Engage" portion and allows for the students to actively participate in the investigations throughout the subsequent steps. The “Evaluate” component of the 5E Lesson Model can be used in many ways by the teacher and by the students.
In this Unit students will learn about ecosystems and the transfer of energy through ecosystems. The lessons in the unit are primarily based on our local ecosystem- the Santa Monica Mountains. This area is known as a Mediterranean Ecosystem or Biome and we will learn about the plants, animals, climate, and human impacts on this area.
In this lesson, students will read an informational article to introduce them to the Mediterranean Ecosystem which is the focus of study for this unit since it is our local ecological area.
Next Generation Science Standards:
The NGSS standards that will be covered in this unit/ lesson are:
5-PS3-1. Use models to describe that energy in animals’ food (used for body repair, growth, motion, and to maintain body warmth) was once energy from the sun.
5-LS1-1. Support an argument that plants get the materials they need for growth chiefly from air and water.
5-LS2-1. Develop a model to describe the movement of matter among plants, animals, decomposers, and the environment.
Disciplinary Core Ideas: This lesson aligns to the Disciplinary Core Ideas of
PS3.D: Energy in Chemical Processes and Everyday Life The energy released [from] food was once energy from the sun that was captured by plants in the chemical process that forms plant matter (from air and water). (5-PS3-1)
LS1.C: Organization for Matter and Energy Flow in Organisms Food provides animals with the materials they need for body repair and growth and the energy they need to maintain body warmth and for motion. (secondary to 5-PS3-1) Plants acquire their material for growth chiefly from air and water. (5-LS1-1)
LS2.A: Interdependent Relationships in Ecosystems The food of almost any kind of animal can be traced back to plants. Organisms are related in food webs in which some animals eat plants for food and other animals eat the animals that eat plants. Some organisms, such as fungi and bacteria, break down dead organisms (both plants or plants parts and animals) and therefore operate as “decomposers.” Decomposition eventually restores (recycles) some materials back to the soil. Organisms can survive only in environments in which their particular needs are met. A healthy ecosystem is one in which multiple species of different types are each able to meet their needs in a relatively stable web of life. Newly introduced species can damage the balance of an ecosystem. (5-LS2-1)
LS2.B: Cycles of Matter and Energy Transfer in Ecosystems Matter cycles between the air and soil and among plants, animals, and microbes as these organisms live and die. Organisms obtain gases, and water, from the environment, and release waste matter (gas, liquid, or solid) back into the environment. (5-LS2-1)
Systems and System Models
A system can be described in terms of its components and their interactions. (5-LS2- 1)
Energy and Matter
Matter is transported into, out of, and within systems. (5-LS1-1)
Energy can be transferred in various ways and between objects. (5-PS3-1)
Science & Engineering Practices:
Developing and Using Models:
Modeling in 3–5 builds on K–2 experiences and progresses to building and revising simple models and using models to represent events and design solutions. Use models to describe phenomena. (5-PS3-1) Develop a model to describe phenomena. (5-LS2-1)
Engaging in Argument from Evidence
Engaging in argument from evidence in 3–5 builds on K– 2 experiences and progresses to critiquing the scientific explanations or solutions proposed by peers by citing relevant evidence about the natural and designed world(s). Support an argument with evidence, data, or a model. (5-LS1-1)
I ask the students to write about what they think an ecosystem is in their Science Notebooks. Most of them have studied these concepts in fourth grade, so they have a pretty good understanding of what an ecosystem is.
I ask a few students to tell me what their definition is an I write a few of their responses on the board. I remind the students about our previous activities involving Food Chains and Food Webs and how they are part of the structure of the Biosphere. I also remind them of our lesson about Biomes.
I tell the students that a biome is different from an ecosystem. An ecosystem is the "interaction of living and nonliving things in an environment". A biome is a specific geographic area notable for the species living there. A biome can be made up of many ecosystems. For example, an aquatic biome can contain ecosystems such as coral reefs and kelp forests.
Students should have a clear understanding of an ecosystem (‘eco’ = home, habitat; ‘system’ = parts working together). They should be able to identify the living and nonliving factors in the ecosystem and label a food chain according to producers, consumers (primary, secondary, tertiary, etc.), and decomposers. The students should fully understand the importance of balance in an ecosystem.
We then discuss the ecosystem that we live in and what components make up this environment. I tell the students that we live in a Mediterranean Ecosystem and that there are only a few places on Earth that have a similar climate as we do. (4 other locations) I tell the students that the main components of an ecosystem are climate, living organisms, and non-living organisms.
I have the students read this article and have them write notes and do annotation on the article. It's a short informative piece that explains the Mediterranean Ecosystem. The website I found this article from does require a log-in and it offers a 30 day free trial (www.Oddizzi.com) and although it is mainly a geography site, it has some great information on ecosystems and animals.
I then give them a Ecosystems Notetaking Sheet for them to write down important facts from the ariicle that's divided into 4 sections: Climate, Flora (plants), Fauna (animals), and non-living (Geology or fire). I tell the students that they need to take notes on all 4 parts of the Ecosystem and that they will then connect these notes to the other lessons we will doing in this unit. Here are some student samples of the notes:
I also tell them to answer the 2 questions on the back of the sheet to show that they understood the article and took thorough notes.
To add more information to their learning about the Mediterranean Ecosystem, I have the students watch the following video to learn more and I tell them to add any other information to their notes that they learn from the video.