These are bounded opportunities, not learner attainment. Partial and blocked source requirements remain so.

• partial: Find patterns between the pitch of a sound and features of the object that produced it

  Bounded objective: Compare pitch while changing one feature at a time. Real sound demonstration conditional; broad shorter/thinner/tighter canonical rule qualified by controlled properties. Research search failed; no invented experimental evidence.

• partial: Describe the pattern: shorter/thinner/tighter objects produce higher-pitched sounds

  Length/tension rules qualified by controlled properties; thinner rule not tested.

• partial: Demonstrate pitch changes using at least one instrument or everyday object

  Safe ruler comparison conditional; supplied prediction not an observation.

• partial: Explain pitch as how high or low a sound is, determined by how fast the object vibrates

  Faster vibration linked to higher pitch; no measured frequency.

• partial: Can {{name}} explain why a short guitar string makes a higher sound than a long one, or why a small drum sounds higher than a big one?

  Try offers supported-model-application for the bounded objective; it does not establish every part of the source assessment. Real sound demonstration conditional; broad shorter/thinner/tighter canonical rule qualified by controlled properties. Research search failed; no invented experimental evidence.

• Real sound demonstration conditional; broad shorter/thinner/tighter canonical rule qualified by controlled properties. Research search failed; no invented experimental evidence.