Algae in Excess

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Plants need nutrients to grow. This is why we apply fertilizers to grass and food crops. In this activity, learners will explore how fertilizers can affect lakes and other bodies of water. Learners will first have to collect a sample of algae from a pond, lake, or stream. Using these samples. Learners will then examine the effects of fertilizer and fish food on the algae over two weeks. Step-by-step instructions are included with photos along with safety recommendations. Activity guide includes a "What's going on?" explanation and relevant connections to the effects of algae growth and death on rivers and lakes.

Quick Guide

Preparation Time:
10 to 30 minutes
Learning Time:
1 to 4 weeks
Estimated Materials Cost:
$5 - $10 per group of students
Age Range:
Ages 8 - adult
Resource Type:
Activity
Language:
English

Materials List (per group of students)

  • 3 clear containers, such as jars or plastic bottles, approximately 500mL (2 c) each
  • Access to a pond, lake or stream with algae
  • Liquid fertilizer used for lawns or house plants
  • Masking tape
  • Marker
  • Disposable gloves
  • One or more drinking straws (optional)
  • Fish food (optional)

Subjects

  • Earth and Space Science
    • Earth Structure
      • Oceans and Water
      • Biosphere
  • Life Sciences
    • Diversity of Life
      • Plants
    • Ecology
      • Ecosystems
      • Human Impact

Informal Categories

  • Nature and Environment

Audience

To use this activity, learners need to:

  • see

Learning styles supported:

  • Uses STEM to solve real-world problems
  • Involves hands-on or lab activities

Other

This resource is part of:

Access Rights:

  • Free access

By:

Source Collection

  • DIY Science App

Rights:

  • , The Regents of the University of California, 2015

Funding Source:

  • National Science Foundation, DRL1114663