HS-LS4-5
The standard
Evaluate the evidence supporting claims that changes in environmental conditions may result in: (1) increases in the number of individuals of some species, (2) the emergence of new species over time, and (3) the extinction of other species.
Next Generation Science Standards
What this standard means
Students need to judge evidence about how environmental change affects populations over time. They should connect a specific change, like drought or overfishing, to shifts in traits, population size, speciation, or extinction. They are not just naming examples. They are weighing data and explaining cause and effect.
Mastery looks like using graphs, maps, fossils, or case studies to support or reject a claim. Students often get stuck treating evolution as a choice made by organisms. They may also confuse individual survival with population change across generations, or describe correlation without explaining the mechanism.
Ways to teach it
- Model natural selection with different colored beans on mixed backgrounds, then change the background and graph which colors survive after each round.
- Ask students to write: Which evidence best supports that drought changed a population, and what evidence would still be missing?
- Give a short graph of fish size over years of heavy fishing, and ask students to choose the strongest claim supported by the data.
- Use antibiotic resistance or pesticide resistance data to connect environmental pressure with trait frequency changes in a real population.
Plan a lesson for HS-LS4-5
Generate a complete lesson plan aligned to this standard, with objectives, activities, and materials. Free, no account needed.
Related standards
- MS-LS2-4
Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.
- 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-LS2-8
Evaluate the evidence for the role of group behavior on individual and species' chances to survive and reproduce.
- K-ESS2-2
Construct an argument supported by evidence for how plants and animals (including humans) can change the environment to meet their needs.