Item AM033003: Ice is harder than liquid water because the molecules of ice are linked more tightly together than the molecules of liquid water.

Why is ice harder than liquid water?

  1. The molecules of ice are not moving.
  2. The molecules of ice are linked more tightly together.
  3. The molecules of ice are harder than the molecules of liquid water.
  4. The molecules of ice are made of solid atoms, and the molecules of liquid water are made of liquid atoms.
(Modified from Smith et al, 2004)