Multiple choice

Which higher-frequency radiation gets blocked by Earth's atmosphere?

  1. x-rays

  2. radio waves

  3. gamma rays

  4. microwaves

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

Earth's atmosphere is opaque to high-energy, high-frequency radiation like X-rays and gamma rays, which are absorbed by the upper atmosphere. This protects life on the surface from harmful ionizing radiation.