Mention the factors, that regulate a population.

Define population.

Mention the factor that affected the rate of a chemical reaction.

Mention the factors which determine whether a planet would have an atmosphere or not.

Assertion: Temperature and soil moisture are the important climatic factors that regulate the process of decomposition. Reason: Warm and moist environment favours decomposition whereas low temperature and anaerobiosis inhibit decomposition.

Mention the factors affecting the flow of heat.