Final answer:
1 kg of gasoline takes up more space than 1 kg of water because gasoline has a lower density. 1 kg of water occupies 1 L while 1 kg of gasoline occupies approximately 1.33 L.
Step-by-step explanation:
When comparing the volume that 1 kg of water occupies with the volume that 1 kg of gasoline occupies, the difference between these two substances can be attributed to their densities. Density is defined as mass per unit volume. Given that water has a density of approximately 1 kg/L and gasoline has a lower density of 0.75 kg/L, for the same mass of 1 kg, gasoline would occupy a larger volume than water. Specifically, 1 kg of water would occupy 1 L, while 1 kg of gasoline would occupy approximately 1.33 L (since 1 kg / 0.75 kg/L = 1.33 L).