Question

Ice floats because _____.

it is less dense than liquid water
it absorbs energy as it freezes
it is a solid
its molecules form crystals

Answer 1

It is less dense than liquid water

Answer 2

Where is energy stored in living systems?

in the water inside all cells
in the blood of the circulatory system
in the nuclei of atoms
in the chemical bonds of molecules

Answer 3

In the nuclei of and atom

Answer 4

In the nuclei of atoms