As a weather balloon released from the surface of earth rises through the troposphere the instruments it carries will usually indicate that

Instruments will indicate that air temperature and air pressure are decreasing.

Troposphere is the first layer of the atmosphere, the closest to the Earth surface. The height of this later is between 6 km (poles) and 17 km (equator). This part of the atmosphere is the densest, so it contains the highest mass (from the water vapor). In troposphere, temperature and pressure decrease as altitude increases.

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