For air parcels to rise high enough for deep thunderstorms they must first become freely buoyant. What is this level called?

The atmospheric conditions on a particular day are such that the temperature at the surface is 15°C and the lifting condensation level (LCL) is at 3 km height above the surface. If an air parcel is lifted from the surface, what is its temperature (in °C) at a height of 2 km above the surface?

Which of the following statements correctly completes this sentence? The three stages of an air mass thunderstorm life cycle are:

Most of the atmospheric mass and virtually all weather are found in the:

The longest ice core taken and currently available for research is:

Speleothems are highly prized because: 

Buchan Caves is the only place it is legal to collect stalactites in Victoria.

Speleothems are predominant made of: