Social trade-offs
http://www.sciencenetlinks.com/lessons.cfm?DocID=71
A lesson plan for Grades 3–5 Science
In this lesson, students learn to make and evaluate decisions by weighing the benefits and drawbacks of each alternative. Students practice decision-making skills through role-playing activities. Science NetLinks provides detailed instructions and links to all web resources necessary for completing the activity.
North Carolina Curriculum Alignment
Science (2005)
Grade 3
- Goal 1: The learner will conduct investigations and build an understanding of plant growth and adaptations.
- Objective 1.01: Observe and measure how the quantities and qualities of nutrients, light, and water in the environment affect plant growth.
- Objective 1.02: Observe and describe how environmental conditions determine how well plants survive and grow in a particular environment.
- Objective 1.03: Investigate and describe how plants pass through distinct stages in their life cycle including.
- Growth.
- Survival.
- Reproduction.
- Objective 1.04: Explain why the number of seeds a plant produces depends on variables such as light, water, nutrients, and pollination.
- Objective 1.05: Observe and discuss how bees pollinate flowers.
- Goal 2: The learner will conduct investigations to build an understanding of soil properties.
- Objective 2.02: Investigate and observe that different soils absorb water at different rates.
- Objective 2.03: Determine the ability of soil to support the growth of many plants, including those important to our food supply.
- Objective 2.04: Identify the basic components of soil:
- Sand.
- Clay.
- Humus.
- Objective 2.05: Determine how composting can be used to recycle discarded plant and animal material.
Grade 4
- Goal 1: The learner will make observations and conduct investigations to build an understanding of animal behavior and adaptation.
- Objective 1.01: Observe and describe how all living and nonliving things affect the life of a particular animal including:
- Other animals.
- Plants.
- Weather.
- Climate.
- Objective 1.02: Observe and record how animals of the same kind differ in some of their characteristics and discuss possible advantages and disadvantages of this variation.
- Objective 1.04: Explain and discuss how humans and other animals can adapt their behavior to live in changing habitats.
- Objective 1.01: Observe and describe how all living and nonliving things affect the life of a particular animal including:
Grade 5
- Goal 1: The learner will conduct investigations to build an understanding of the interdependence of plants and animals.
- Objective 1.01: Describe and compare several common ecosystems (communities of organisms and their interaction with the environment).
- Objective 1.02: Identify and analyze the functions of organisms within the population of the ecosystem:
- Producers.
- Consumers.
- Decomposers.
- Objective 1.03: Explain why an ecosystem can support a variety of organisms.
- Objective 1.04: Discuss and determine the role of light, temperature, and soil composition in an ecosystem's capacity to support life.
- Objective 1.05: Determine the interaction of organisms within an ecosystem.
- Objective 1.06: Explain and evaluate some ways that humans affect ecosystems.
- Habitat reduction due to development.
- Pollutants.
- Increased nutrients.
- Goal 2: The learner will make observations and conduct investigations to build an understanding of landforms.
- Objective 2.01: Identify and analyze forces that cause change in landforms over time including:
- Water and Ice.
- Wind.
- Gravity.
- Objective 2.02: Investigate and discuss the role of the water cycle and how movement of water over and through the landscape helps shape land forms.
- Objective 2.03: Discuss and consider the wearing away and movement of rock and soil in erosion and its importance in forming:
- Canyons.
- Valleys.
- Meanders.
- Tributaries.
- Objective 2.07: Discuss and analyze how humans influence erosion and deposition in local communities, including school grounds, as a result of:
- Clearing land.
- Planting vegetation.
- Building dams.
- Objective 2.01: Identify and analyze forces that cause change in landforms over time including:



