Question

4 why dont scientists know more about earths core and how it works?

Explanation:

Earth's core is located approximately 2900 kilometers beneath the planet's surface. The extreme conditions there—including immense pressure (over 3 million times atmospheric pressure) and temperatures exceeding 5000°C—make it impossible for any drilling technology or direct sampling mission to reach or survive in the core. Scientists can only study it indirectly, using data from seismic waves generated by earthquakes, which provides limited, indirect insights rather than direct observations.

Answer:

Scientists cannot directly access or observe Earth's core because it is buried 2900 km below the surface, with extreme, uninhabitable pressure and temperature conditions. They only have indirect data (like seismic wave measurements) to study it, which limits the depth of their understanding of its exact composition and behavior.