Please help me with 9 and 10 don’t send me a link please tell me here

9. b

10. a

Density would have to do with if the powder is floating or sinking, conductivity would have to do with heat and mass would have to do with weight, leaving solubility as the only reasonable answer.

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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