Students figure out that they can trace all food back to plants, including processed and synthetic food. They obtain and communicate information to explain how matter gets from living things that have died back into the system through processes done by decomposers. Students finally explain that the pieces of their food are constantly recycled between living and nonliving parts of a system.

By studying key processes in the carbon cycle, such as photosynthesis, composting and anaerobic digestion, students learn how nature and engineers "biorecycle" carbon. Students are exposed to examples of how microbes play many roles in various systems to recycle organic materials and also learn how the carbon cycle can be used to make or release energy.

CK-12’s Life Science delivers a full course of study in the life sciences for the middle school student, relating an understanding of the history, disciplines, tools, and modern techniques of science to the exploration of cell biology, molecular biology, genetics, evolution, prokaryotes, protists,fungi, plants, animals, invertebrates, vertebrates, human biology, and ecology. This digital textbook was reviewed for its alignment with California content standards.

In this experiment, students investigate the importance of carbon dioxide to the reproductive growth of a marine microalga, Dunalliela sp. (Note that the directions are for teachers and that students protocol sheets will need to be created by teachers.)

In this 3-part lab activity, students investigate how carbon moves through the global carbon cycle and study the effects of specific feedback loops on the carbon cycle.

With funding from the Environmental Protection Agency, The Washington State Department of Natural Resources' Aquatic Assessment and Monitoring Team (AAMT) developed three curricula (elementary, middle, and high school) that are designed to bridge the goals of bringing local climate science into Washington state classrooms and local internships by highlighting aspects of the Acidification Nearshore Monitoring Network (ANeMoNe)
More specifically, the curricula focus on local climate science issues and incorporate elements of scientific monitoring methods and community science to showcase how climate is being addressed in Washington State and how students can get involved in fighting climate change in their own “backyards”.​ Youth learn principles of aquatic ecology, environmental and social impacts driven by climate change, government and social response, and issues of environmental justice.
These climate resilience curricula are intended to inspire and engage youth throughout Washington to implement climate change adaptations in their local communities.

In a multi-week experiment, students monitor the core temperatures of two compost piles, one control and one tended, to see how air and water affect microbial activity. They daily aerate and wet the "treated" pile and collect 4-6 weeks' worth of daily temperature readings. Once the experiment is concluded, students plot and analyze their data to compare the behavior of the two piles. They find that the treated pile becomes hotter, an indication that more microbes are active and releasing heat. Through this activity, students see that microbes play a role in composting and how composting can be used as a carbon management process.

In a multi-week experiment, student teams gather biogas data from the mini-anaerobic digesters that they build to break down different types of food waste with microbes. Using plastic soda bottles for the mini-anaerobic digesters and gas measurement devices, they compare methane gas production from decomposing hot dogs, diced vs. whole. They monitor and measure the gas production, then graph and analyze the collected data. Students learn how anaerobic digestion can be used to biorecycle waste (food, poop or yard waste) into valuable resources (nutrients, biogas, energy).

This activity illustrates the carbon cycle using an age-appropriate hook, and it includes thorough discussion and hands-on experimentation. Students learn about the geological (ancient) carbon cycle; they investigate the role of dinosaurs in the carbon cycle, and the eventual storage of carbon in the form of chalk. Students discover how the carbon cycle has been occurring for millions of years and is necessary for life on Earth. Finally, they may extend their knowledge to the concept of global warming and how engineers are working to understand the carbon cycle and reduce harmful carbon dioxide emissions.

In Unit 2 of the Explore the Salish Sea curriculum, students will review the water cycle, learn the parts of a watershed, and the effects of erosion and pollution, then learn ways of purifying these waters before they enter our streams and estuaries to safeguard these ecosystems for marine life and us.
Each unit in this series contains a detailed unit plan, a slideshow, student journal, and assessments. All elements are adaptable and can be tailored to your local community.

In this unit, students will solve a mystery about changes in oyster larvae in the Salish Sea, causing oyster farmers to send their larvae to Hawaii until they grow stronger. They will look for clues in:
• activities and games, articles, and films that introduce the concepts of habitat and ecosystem
• structures and behaviors for survival in intertidal zone habitats
• the Earth-moon-sun interactions that drive the tides
• the importance of First Foods of the intertidal to first nations communities;
• how intertidal organisms interact across the Salish Sea food web
Afterward, they will arrive at the importance of a balanced carbon cycle in the health of the ocean and use a full scientific investigation to test if their local waters have a healthy pH for oyster larvae and other shelled creatures. Clear pathways of hope are woven into this complex issue, so students know that scientists and leaders are working to solve this problem - and kids can help!

This is a hands-on inquiry activity using zip-lock plastic bags that allows students to observe the process of fermentation and the challenge of producing ethanol from cellulosic sources. Students are asked to predict outcomes and check their observations with their predictions. Teachers can easily adapt to materials and specific classroom issues.

In a multi-week experiment, student groups gather data from the photobioreactors that they build to investigate growth conditions that make algae thrive best. Using plastic soda bottles, pond water and fish tank aerators, they vary the amount of carbon dioxide (or nutrients or sunlight, as an extension) available to the microalgae. They compare growth in aerated vs. non-aerated conditions. They measure growth by comparing the color of their algae cultures in the bottles to a color indicator scale. Then they graph and analyze the collected data to see which had the fastest growth. Students learn how plants biorecycle carbon dioxide into organic carbon (part of the carbon cycle) and how engineers apply their understanding of this process to maximize biofuel production.

European green crabs (Carcinus maenas) are considered to be one of the world’s worst invasive species. In 2021, the Washington Department of Fish and Wildlife (WDFW), tribes, and partners identified an exponential increase of invasive European green crabs in areas on Washington’s outer coast. The crabs' invasion poses a growing threat to Washington’s economic, environmental, and cultural resources. Unfortunately, experts believe European green crabs will never be fully eradicated due to large populations in neighboring states.

Throughout this unit, students will explore why European green crabs are such a concerning invasive species, how they may impact the biodiversity of Washington’s estuaries, and what options are available for controlling their population. Perhaps most importantly, students will understand how they can help by learning how to identify and report European green crabs to support efforts to control them and limit their harm.

In this unit students will:

Develop a model of how European green crabs are a threat to estuary ecosystems.
Describe what an estuary is and learn about other organisms who live there.
Make predictions of what will happen to an estuary food web with the introduction of European green crabs.
Observe normal population fluctuations in a healthy estuary ecosystem over time.
Simulate the effects of the introduction of European green crabs to a healthy estuary ecosystem.
Evaluate the methods considered to control the populations of European green crabs in Washington state.
This mini unit is designed to be able to stand alone, or to supplement OpenSci Ed unit 7.5 Ecosystem Dynamics: “How does changing an ecosystem affect what lives there?”. To ensure this unit is easily implemented, the unit has been designed to replicate the processes and procedures utilized by OpenSci Ed.

In this activity, students explore the way that human activities have changed the way that carbon is distributed in Earth's atmosphere, lithosphere, biosphere and hydrosphere.

In this activity, students explore the role of combustion in the carbon cycle. They learn that carbon flows among reservoirs on Earth through processes such as respiration, photosynthesis, combustion, and decomposition, and that combustion of fossil fuels is causing an imbalance. This activity is one in a series of 9 activities.

In this activity, students conduct a life cycle assessment of energy used and produced in ethanol production, and a life cycle assessment of carbon dioxide used and produced in ethanol production.

In this lesson, students will extend their knowledge of matter and energy cycles in an organism to engineering life cycle assessment of a product. Students will learn about product life cycle assessment and the flow of energy through the cycle, comparing it to the flow of nutrients and energy in the life cycle of an organism.

What do Prairie Chickens Need in Order to Survive Today's Prairie?

This middle school unit covering ecosystems, animal behavior and symbiosis was developed through the Storyline approach. Middle school students will be figuring out why prairie chickens have a very unique dance and understand the role cows play to help ensure the dance takes place. Using this approach, students engage in science concepts to help ensure the survival of the prairie chicken.

Our project involves students learning about the values of a natural area in their community and producing a public service announcement and map to show its value and how it could be developed.