The balance may not have been on a level surface, causing inaccurate readings.

You: ‘Emma did you check that the balance was level before we used it?’

 

Emma gestures toward the base of the balance. “I verified the balance was level before use. I remembered that this balance has a built-in spirit level, and I confirmed the bubble was centered. 

 

Dr Smith: ‘Well-done Emma! This step ensures accurate readings when the scale is perfectly horizontal. If it were off, you’d see the bubble shifted, indicating a tilt.” 

 

We still have two options to consider. Which is more likely? 

  • The fertilizer was added while the window was open, allowing air currents to interfere.
  • You and Emma might have forgotten to tare the balance with the plastic bag in place.

Map: CS12 - USING BASIC LABORATORY EQUIPMENT_4 (1062)
Node: 20046
Score:

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  • The balance may not have been on a level surface, causing inaccurate readings.

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