HS-LS4-1
The standard
Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence.
Next Generation Science Standards
What this standard means
Students need to explain, in speaking or writing, how several kinds of evidence point to common ancestry and evolution. They should connect DNA similarities, shared body structures, fossils, and embryo patterns to the idea that species are related and have changed over time.
Mastery looks like using more than one evidence type in a clear claim, not just listing facts. Students often get stuck treating “similar” as proof by itself, mixing up individual adaptation with population change, or thinking evolution means one living species turned into another living species.
Ways to teach it
- Give students DNA snippets, limb diagrams, and embryo images, then have them sort the cards into evidence groups and write one claim from each group.
- Ask: Which evidence would convince you most that whales and hippos share an ancestor, DNA, bones, embryos, or fossils, and why?
- Use an exit ticket with one claim, two evidence types, and one sentence explaining how each supports common ancestry.
- Compare dog breeds, then show that artificial selection changes populations, connecting the idea to natural changes over long time periods.
Plan a lesson for HS-LS4-1
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