Explanation:
The long gap of 300 million years between the origin of earth and of life on it was due to lack of suitable temperature. Initially the temperature of earth was too high. Different scientists have different views some says- it was \(5000-6000^{\circ} \mathrm{C}\) and some says it was upto \(9000^{\circ} \mathrm{C}\). But in recent researches it was conducted that, at this high temperature elements cannot survive. Hence, it was upto \(900-1000^{\circ} \mathrm{C}\), temperature decreases gradually time to time.