Multiple choice

Who discovered that the Earth has a solid inner core inside a molten outer core?

  1. Clara Barton

  2. Inge Lehmann

  3. Nettie Stevens

  4. Mildred Dressehaus

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Inge Lehmann was a Danish seismologist who discovered that the Earth has a solid inner core by analyzing seismic waves.