Estimate the Number of Times an Average Person's Heart Beats $69 \text { beats/min }$

question 26

Multiple Choice

Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is $69 \text { beats/min }$ and a life span of 75 years.

• A) 3 × 10⁹ beats
• B) 3 × 10⁸ beats
• C) 3 × 10¹⁰ beats
• D) 3 × 10⁷ beats

Grasp the relationship and interactions between Earth's spheres (lithosphere, atmosphere, biosphere, hydrosphere).

Recognize the causes and impacts of natural disasters such as floods.

Understand the processes and effects of Earth's geological cycles, including the rock cycle.

Analyze the impact of geographical features on human activities and hazards.

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