In terms of standard addition method, the density and surface tension of an amino acid ionic liquid EMIGly-(1-ethyl-3-methylimidazolium aminoacetate) were measured under dry argon atmosphere in the temperature range of 288.15-343.15 K. The properties of volume and surface for pure EMIGly were discussed in terms of the interstice model and Glasser's theory. The thermal expansion coefficient alpha = 5.03 x 10(-4) K-1 calculated using interstice model is in good agreement with alpha (experimental) 5.20 x 10(-4) K-1.