Particles of a liquid
a. are tightly packed together and stay in a fixed position.
b. have no viscosity.
c. decrease in volume with increasing temperature.
d. are free to move in a container but remain in close contact with one another.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.