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:

Gear Loads

The forces exerted on gears during operation, which can influence their durability, performance, and required specifications.

Reverse Capability

The feature of a system, machine, or vehicle that allows it to operate or move backward.

Modulator Pressure

The pressure within an automatic transmission's hydraulic system that helps control shift timing and quality.

Upshifts

The action or process of shifting a vehicle's transmission to a higher gear as speed or load increases.