Aurorae on Earth are caused by
A) electrical currents in the ionosphere,generated by dynamo action in Earth's core.
B) charged particles from the Sun moving through Earth's magnetic field and striking the upper atmosphere.
C) the reflection of sunlight from Arctic and Antarctic ice into the polar night skies.
D) ultraviolet radiation from the Sun ionizing atoms in the upper atmosphere.

Question

Quizplus · Accepted Answer

Aurorae, also known as Northern or Southern Lights, are caused by charged particles, mostly electrons and protons, from the Sun colliding with atoms and molecules in Earth's upper atmosphere. These charged particles are part of the solar wind and are guided towards Earth's magnetic poles by our planet's magnetic field. As they collide with the particles in the atmosphere, they release energy in the form of light, creating the colorful and dynamic displays we see as aurorae.

Aurorae on Earth Are Caused by