Sometimes, small pieces of rock or dust enter the Earth's atmosphere. When this material heats up and burns, it glows and becomes
visible from the Earth's surface.
These burning pieces of material are called
A. meteors
B. moons
C. comets
D.
planetoids

a

explanation:

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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i think its 100

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the correct answer would be b) volume versus temperature, because they are also directly proportional.