How can you use these materials to test whether land or water heats faster? The materials are sand
water
heat lamps
thermometers
cups

Explanation:

You can test by putting sand in one cup and water in another. Then you put the thermometers in the cups. One you have done that you can use the heat lamp and put both cups under it for the same amount of time. After you do  that and recorded your data you are done with the experiment.

Hope this helps :D