VII. Broader Implications: Beyond IELTS

Task: Complete the summary using words from the box below.

| Word | Definition | Example from the passage | | :--- | :--- | :--- | | | An object made by humans, typically of historical interest | “The physical artifact known as Le Grand K.” | | Drift | Gradual change or deviation | “The worrying drift in mass over decades.” | | Calibrate | To adjust or mark precise measurements | “Scientists calibrate instruments against the standard.” | | Invariant | Never changing; constant | “Seeking an invariant natural constant.” | | Prototype | An original model on which later versions are based | “The international prototype kilogram.” |

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usually regarding the causes and effects of obesity.