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📘 Start with a claim that can be checked

A science explanation begins with a claim: a sentence that answers the question and could be checked against observations or measurements. “Plants grow” is too broad to guide a useful explanation. “Plants given more light grow taller over t

4
lessons
~20 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. Build the claimWrite a checkable claim and connect it to mechanism, evidence, and comparison.Separate the conclusion from the reason and choose evidence that bears on the proposed process.
  2. Explain the processOrder causal steps and treat models as simplified tools.Put the mechanism in sequence and say what a diagram or model can and cannot establish.
  3. Set the boundaryState where the claim applies and qualify uncertainty specifically.Name conditions and limits instead of universal language or vague maybe.
  4. Revise the explanationTest against alternatives and run a claim-mechanism-evidence-boundary check.Defeat the preferred explanation with a live competitor, then repair the weakest link.

Questions this course answers

Which sentence is the strongest claim for a science explanation?

It states a checkable relationship and identifies conditions and a time span.

What does a mechanism add to a claim?

A mechanism explains how the parts of a system could produce the observed effect.

Why is a comparison group useful?

A baseline or control gives the evidence a meaningful counterfactual.

Which is a good boundary for a greenhouse seedling study?

A boundary states the population and conditions supported by the evidence without overgeneralizing.

Which qualifier communicates uncertainty most specifically?

It names the direction, uses evidence-appropriate language, and keeps the trial boundary visible.

Which part of an explanation states where and how far the conclusion applies?

A boundary names the population, conditions, and limits supported by the evidence.

Grounded in trusted sources

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Every Wunder lesson is built from real, reputable sources — never invented.

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