Final answer:
Geologists study Earth's interior directly by collecting drill core samples of the crust and measuring seismic wave activity.
Explanation:
Geologists study direct evidence of Earth's interior primarily through two main methods:
- Collecting drill core samples of Earth's crust, commonly done from the ocean floor by organizations like the International Ocean Discovery Program using specialized ships for drilling.
- Measuring seismic wave activity by sending sound waves into the ground or seafloor, allowing geologists to interpret the reflections of these waves to understand the subsurface geology.
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