What hypothesis will the experiment test? What are the variables?

What purpose would the sand serve?

What purpose would the water serve?

What purpose would the heat lamps serve?

A primary function of water is to serve as a lubricant. For example, it is found in saliva and is a substantial component in the fluid surrounding joints. Water is also in and surrounding body structures such as the brain, spinal cord and eyes. Sand is a non-renewable resource over human timescales, and sand suitable for making concrete is in high demand. [2] Desert sand, although plentiful, is not suitable for concrete, and 50 billion tons of beach sand and fossil sand is needed each year for construction.

Explanation:

the answer to your question is:

c. complementary base-pairing

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.