Explore how limited water, nutrients, and light affect ecosystem growth and survival with this Grade 6 science learning stations activity. Built around the topic of ecosystems: interactions, energy, and dynamics, When Resources Run Low guides students in examining how resource availability influences organism populations, species distribution, and ecosystem carrying capacity.

Rather than treating resource limitations as isolated facts, students investigate the relationships between environmental conditions and living things. They consider how access to essential resources affects an organism's ability to survive and how changes in resource availability can influence the balance of an ecosystem.

What Students Investigate

• Essential resources: Explain how water, nutrients, and light can limit the growth and survival of organisms.
• Population size: Interpret observations to connect resource availability with changes in the number of organisms in an ecosystem.
• Species distribution: Examine how resource conditions influence where organisms can survive.
• Carrying capacity: Compare how changes in available resources affect an ecosystem's ability to support populations.

These concepts help students develop a clearer understanding of limiting resources and the interactions between organisms and their environment.

How the Learning Stations Work

Set up the activity by placing a case-study card at each classroom station. Small groups begin at different stations, read the information provided, and record their observations and responses on their own station recording sheet. Groups rotate through the stations until everyone has visited each one, then complete the station wrap-up to bring their learning together.

This structure gives students a way to examine resource availability across different cases, organize their observations, and compare how environmental limitations affect ecosystems. The recording sheet keeps their written work separate from the station cards, making the materials suitable for a rotating classroom activity.

Included in the Resource

• Station recording sheet: A place for students to document their observations and responses as they visit the stations.
• Station wrap-up: A concluding activity for reviewing and comparing ideas about resource limitations.
• Station case-study cards: The information students read and use during the investigation.
• Answer Key PDF with Teacher Guide: Includes learning objectives, teaching tips, discussion questions, and common mistakes to help guide instruction.

Classroom Use and NGSS Connection

Use this Grade 6 ecosystems activity during a unit on population dynamics, ecosystem interactions, or environmental resource limitations. It can support small-group rotations, collaborative observation, and a whole-class discussion about why populations cannot grow indefinitely when essential resources become limited.

The resource identifies NGSS MS-LS2-1 as its curriculum reference. It gives teachers a focused way to address the relationship between resource availability and the growth and survival of organisms while keeping students' observations and comparisons central to the lesson.

Choose When Resources Run Low when your class needs a structured investigation of limiting resources, population size, species distribution, and carrying capacity rather than a lesson focused only on vocabulary definitions.