Auroras on Earth Are Caused By

question 418

Multiple Choice

Auroras on Earth are caused by:

• A) the reflection of sunlight from the Arctic and Antarctic ice into the polar skies.
• B) electrons accelerated by electric currents in the ionosphere and then deposited into Earth's atmosphere.
• C) high-energy charged particles from the magnetosphere guided by Earth's magnetic field into polar regions of the atmosphere.
• D) ultraviolet radiation from the Sun exciting and ionizing atoms in Earth's upper atmosphere to emit characteristic colors of light.

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Definitions:

Brain

The central organ of the human nervous system, responsible for processing sensory data, regulating physical functions, and facilitating cognitive abilities such as thought and emotion.

Plantar Reflex

A reflex elicited when the sole of the foot is stimulated, causing the toes to point downward.

Dorsiflexion

The movement that brings the top of the foot toward the shin, decreasing the angle between the dorsum of the foot and the leg.

Plantar Flexion

A movement that decreases the angle between the sole of the foot and the back of the leg, such as pointing the toes.