Grade 9 Lab / experiment
Clearing Muddy Water: A Coagulation and Settling Lab
A grade 9 lab where students compare how muddy water clears with and without a coagulant, rating cloudiness over time and linking their results to real treatment plants.
Water Science · Grade 9
These materials teach earth science, chemistry, biology, and physics through water systems, from the water cycle to treatment chemistry.
61 materials written for this grade · refine by type, topic, or standard in the catalog
Grade 9 Lab / experiment
Salt, Conductivity, and Dissolved Solids: A Grade 9 Water Lab
A grade 9 lab where students test how dissolved salt changes water's electrical conductivity, then link the result to dissolved solids and reverse osmosis.
Grade 9 Lesson plan
Alder Mesa's Shrinking Aquifer: Modeling Groundwater Drawdown
A grade 9 Earth science lesson using aquifer storage change to write a linear equation projecting when a fictional town's water table hits a critical level.
Grade 9 Debate kit
Mandatory Buffer Strips Along Fenwick Creek: A Grade 9 Debate Kit
A grade 9 debate kit on requiring farms along a fictional creek to keep vegetated buffer strips, weighing nutrient runoff against lost farmland and income.
Grade 9 Lesson plan
Kettle Bend Dam: Weighing Fish Passage Options With Cost-Benefit Math
A grade 9 ecology lesson where students evaluate three options for a fictional dam blocking trout habitat, calculating cost per mile of habitat regained for each.
Grade 9 Worksheet
Marrow Creek's Constructed Wetland: Nitrate Removal and Detention Time
A grade 9 worksheet where students calculate nitrate removal efficiency, loading, and detention time for a fictional constructed wetland treating farm runoff.
Grade 9 Reading passage
From Wastewater to Groundwater: Orange County's Recycling System
A grade 9 informational passage on the Orange County Groundwater Replenishment System, tracing its three-step purification process and comparing it to ocean desalination.
Grade 9 Math problem set
Pinch Creek Reservoir: Graphing Two Drought Conservation Paths
A grade 9 math problem set where students build and graph linear equations for a fictional reservoir's storage under current withdrawal versus a conservation order.
Grade 9 Math problem set
Quill Lake's Algal Bloom: Exponential Growth and Linear Cleanup
A grade 9 math problem set modeling a fictional lake's algal bloom, contrasting exponential growth before treatment with linear decline after treatment starts.
Grade 9 Worksheet
Piloting Reverse Osmosis for Salt Fork's Brackish Well Water
A grade 9 worksheet in which students size a reverse osmosis pilot skid for a fictional town's brackish well, calculating recovery rate and concentrate salinity.
Grade 9 Worksheet
Chlorine Dosing at Thistle Hollow: A Grade 9 Unit-Conversion Worksheet
A grade 9 worksheet where students chain unit conversions and the pounds formula to calculate chlorine feed rates for a fictional town's water treatment plant.
Grade 9 Lesson plan
Windrow Creek's Watershed: Modeling Runoff After Development
A grade 9 Earth science lesson where students use the rational method to compare peak stormwater runoff before and after development in a fictional watershed.
Grade 9 Lab / experiment
Bell Creek Nutrient Pollution: A Grade 9 Dissolved Oxygen Lab
A grade 9 lab where students test three simulated creek samples for nitrate, pH, dissolved oxygen, and turbidity to investigate how farm runoff drives eutrophication.