Matching Pairs HOW DO WE STUDY POPULATION?Online version Match each word with the correct definition. by Cristina González López 1 Is the number of deaths in a population in a specific period. 2 The number of births in a population in a specific period is measured by this. 3 The number of deaths in a population in a specific period is measured by this. 4 It is an estimate of the average number of children that a woman has during her lifetime 5 It is the number of births in a population in a specific period. Crude death rate Death rate. Total fertility rate Birth rate Crude birth rate.