MS-LS2-2
The standard
Construct an explanation that predicts patterns of interactions among organisms across multiple ecosystems.
Next Generation Science Standards
What this standard means
Students need to explain how organisms interact in ecosystems and use those patterns to make predictions in new places. They should connect predators, prey, competitors, mutual partners, and nonliving factors like water, light, temperature, and soil.
Mastery looks like a clear claim with evidence from more than one ecosystem, such as a pond and a desert. Students often list facts instead of predicting patterns. They may also confuse competition with predation, or ignore abiotic factors when explaining why an interaction happens.
Ways to teach it
- Give pairs ecosystem cards with organisms and abiotic factors, then have them sort each pair as predation, competition, or mutualism.
- Ask students to write: If rainfall drops in a grassland and a pond, what interactions will likely change, and why?
- Show a new ecosystem photo and have students write one predicted organism interaction with one abiotic factor as evidence.
- Connect to school grounds by observing ants, plants, birds, shade, and water, then predicting which interactions would change after a week without rain.
Plan a lesson for MS-LS2-2
Generate a complete lesson plan aligned to this standard, with objectives, activities, and materials. Free, no account needed.
Related standards
- MS-LS1-5
Construct a scientific explanation based on evidence for how environmental and genetic factors influence the growth of organisms.
- HS-LS2-6
Evaluate the claims, evidence, and reasoning that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable...
- HS-LS2-1
Use mathematical and/or computational representations to support explanations of factors that affect carrying capacity of ecosystems at different scales.
- MS-LS1-6
Construct a scientific explanation based on evidence for the role of photosynthesis in the cycling of matter and flow of energy into and out of organisms.