What happens to the water in the small tube as the water in the test tube absorbs heat?
Why do you think a small tube was used to observe the expansion of water?

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

the dependant variable is spilled water

the independent is the heat