Science changes when stronger evidence improves or replaces an explanation.
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LIVE VISUAL LAB
APERTURE6 mLarger collecting area reveals fainter light.
Interactive teaching model • relationships are controlled; scale, distance or timing may be simplified and are labeled here.
The big idea
Science changes when stronger evidence improves or replaces an explanation.
Revision is a strength: it means ideas remain accountable to observations rather than authority.
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HOW SCIENTISTS KNOW
The history of planetary models, stellar physics and cosmology shows predictions becoming more accurate.
WORDS TO OWN
revisionevidenceexplanationscience
!A COMMON WRONG MODEL
Changing an explanation means science failed.
✓REBUILD IT WITH EVIDENCE
Science improves by correcting explanations when better evidence arrives.
A scientifically true sentence can still create a false picture. This repair makes the relationship visible.
Take learning into real life
Try it together
Cut two different-size openings in scrap card. With an adult using an ordinary flashlight in a dim room, compare how much light each opening admits. Connect what you notice to science changes when evidence improves using revision and evidence.
GREEN SAFETYOrdinary low-risk activity with normal caregiver awareness.
01TALKWhat do you predict before we try it?02LOOKWhat changed? What stayed the same?03EXPLAINWhich evidence supports your idea?
Check understanding
Which statement best explains science changes when evidence improves?
Choose the explanation that matches the evidence—not just the most familiar words.
Three things to remember
✓Science changes when stronger evidence improves or replaces an explanation.
✓Revision is a strength: it means ideas remain accountable to observations rather than authority.
✓Evidence matters: the history of planetary models, stellar physics and cosmology shows predictions becoming more accurate.
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