Grade 6 Lesson plan
Merrow Bay Nitrogen: A Needed Nutrient and a Pollutant
A 45-minute grade 6 lesson where students study a fictional bay to see how nitrogen feeds plants yet, in excess, fuels algae blooms that lower the oxygen fish need.
NGSS · Middle School (6–8)
MS-LS2-1 Analyze how resource availability affects populations
Analyze and interpret data to provide evidence for the effects of resource availability on organisms and populations of organisms in an ecosystem.
Clarification statement: Emphasis is on cause and effect relationships between resources and growth of individual organisms and the numbers of organisms in ecosystems during periods of abundant and scarce resources.
Why water teaches this standard well
Water is one of the resources whose abundance or scarcity most directly drives population change, making drought and streamflow data ideal for this standard. Students can analyze how a dry year shrinks a fish population or how restoring flow to a stream lets it recover.
Materials tagged with this code are written to the full standard , including its clarification statement , and each carries a written note explaining the alignment. See how we review materials.
23 materials aligned to MS-LS2-1
Lesson plans
Worksheets
Grade 6 Worksheet
Sedgemoor Reservoir: Temperature and Dissolved Oxygen Data
A grade 6 science worksheet where students summarize a fictional reservoir's oxygen data and link warm water to lower oxygen for fish.
Grade 7 Worksheet
Ormsby Brook Dissolved Oxygen: A Grade 7 Fish Habitat Worksheet
A grade 7 science worksheet where students read dissolved-oxygen and temperature data from a cold-water stream and find when the water drops below the level fish need.
Grade 7 Worksheet
Tanner Creek Water Quality: Oxygen, Temperature, and pH
A grade 7 science worksheet comparing dissolved oxygen, temperature, and pH at two sites on fictional Tanner Creek, with percent-change work and a fish habitat benchmark.
Grade 7 Worksheet
Sludge Microbes at Wickford Water Reclamation: Grade 7 Worksheet
A grade 7 science worksheet on the microbes that clean wastewater: students reason about food and oxygen supply and compute the percent of BOD an aeration tank removes.
Grade 8 Worksheet
Kestrel Lake's Oxygen Crash: Reading a Summer Depth Profile
A grade 8 science worksheet where students read a fictional lake's dissolved-oxygen depth profile, find the low-oxygen zone, and trace a nutrient-driven fish kill.
Grade 6 Worksheet
Fertilizer Runoff and the Algae Bloom at Dovetail Pond
A grade 6 worksheet where students use percent-of-a-quantity math to trace how fertilizer runoff feeds an algae bloom and drops dissolved oxygen at a fictional pond.
Grade 7 Worksheet
Alder Run's Aeration Tank: Bacteria, Oxygen, and BOD Removal
A grade 7 worksheet on activated-sludge treatment biology, using real EPA effluent standards to calculate percent BOD removal at a fictional facility.
Grade 8 Worksheet
Granite Fork Reservoir Water Quality: Reading a Sample Data Table
A grade 8 worksheet where students read a fictional reservoir's dissolved oxygen, pH, and bacteria data, compare it to real thresholds, and use scientific notation.
Classroom activities
Grade 6 Classroom activity
The Otter Run Stream Survey: A Water Quality Bug Hunt
A grade 6 science station activity where students sort stream-bug cards from three sites and rate each site's water quality using sensitive and tolerant bugs.
Grade 7 Classroom activity
The Corvin Lake Nutrient Path: A Grade 7 Eutrophication Game
A grade 7 role-play where students move nutrient and oxygen tokens along a lake pathway to model fertilizer runoff, an algae bloom, and an oxygen crash.
Grade 8 Classroom activity
Bickerton Brook Macroinvertebrate Index: A Card Sort
A grade 8 science activity where groups sort stream insect cards by pollution tolerance and calculate a biotic index for three sites on a fictional brook.
Grade 8 Classroom activity
Brackenfield's Activated Sludge: A Wastewater Microbe Role-Play
A grade 8 science role-play where students act as microbes, oxygen, and organic matter to model how activated sludge cleans wastewater and why aeration matters.
Grade 8 Classroom activity
Vesper Valley Drought: A Reservoir Allocation Simulation
A grade 8 science simulation where student teams negotiate how to split a shrinking reservoir among a city, farms, and a river across four drought years.
Reading passages
Grade 6 Reading passage
What Lives Under Wrenmere Creek's Gravel Bed
A grade 6 science reading passage on the water that moves through a creek's gravel bed, with fictional monitoring data and six comprehension questions.
Grade 7 Reading passage
Why Kingsloe's Tap Water Tastes Different Each October
A grade 7 science reading passage on summer layering and fall turnover in a fictional reservoir, with a depth data table and seven comprehension questions.
Grade 6 Reading passage
Feeding the Ellersby Digesters: Sludge, Microbes, and Gas
A grade 6 reading passage about the microbes inside the sludge digesters at Ellersby, with a five-week data table and seven comprehension questions.
Grade 8 Reading passage
Layers in Ambergate Reservoir: Stratification and Turnover
A grade 8 science passage on how a reservoir stratifies in summer and mixes in fall, with a depth-profile table linking dissolved oxygen to where fish can live.
Grade 8 Reading passage
Why Hallam Reservoir Tasted Like Dirt in August
A grade 8 science reading passage about a summer algae bloom that made a fictional town's tap water taste earthy, and how the plant treated the symptom and the cause.
Grade 8 Reading passage
The Microbes That Clean Our Wastewater at Sedgefield
A grade 8 science reading passage on how bacteria in an activated-sludge plant eat wastewater pollution, with literal and inferential comprehension questions.
Writing prompts
Grade 6 Writing prompt
Why Stagbrook's Oxygen Runs Lowest Just Before Sunrise
A grade 6 science argument prompt: students use a 24-hour oxygen and temperature record from a fictional creek to explain the dawn low that killed minnows.
Grade 6 Writing prompt
Ellerby Reservoir's Musty August Water: Which Intake Depth?
A grade 6 science argument prompt using a fictional reservoir's summer depth profile to decide which intake depth a plant should use and why algae grow where they do.
Graphic organizers
Grade 8 Graphic organizer
Nutrient Runoff and a Reservoir Fish Kill: A Cause-Effect Chain
A grade 8 cause-and-effect graphic organizer mapping how fertilizer runoff into a reservoir leads step by step to an algal bloom and a fish kill.