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Lightning damage comes chiefly from ______________ discharge.

Clouds are formed by __________ air motion and shaped by __________ air motion.

Although they may have less total energy than some other storms, __________ are the most violent of all storms.

The apparent path that the Sun traces annually along the celestial sphere is known as the ______________.

The Moon rises 50 minutes later each day because

The Sun’s high-speed charged nuclei and electrons form a fourth phase of matter known as a

The ________________ is located beyond the orbit of Neptune.

The sky is blue because the atmosphere __________ sunlight more for blue wavelenghts.

Sudden, bright, explosive events originating on the Sun’s surface which release energy associated with the Sun’s magnetic field are called

Prominent groups of stars in the night sky that appear to an Earth observer as distinct patterns are called __________.