Multiple choice

The average thickness of earth's crust is

  1. 45 km

  2. 35 km

  3. 39 km

  4. 50 km

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

The Earth's continental crust has an average thickness of approximately 35 km, varying from about 30-50 km in different regions. Oceanic crust is thinner at around 5-10 km. The 35 km value represents the global average for continental crust, which is what geologists typically refer to.