Question

as they gain heat energy and their temperatures increase, objects tend to ______. answer options: select one of four expand if theyre liquids or gases expand contract contract if theyre liquids or gases

Explanation:

When objects gain heat energy and their temperature increases, most substances (solids, liquids, and gases, with some exceptions like water in certain ranges) tend to expand. The option "expand if they're liquids or gases" is too limited as solids also expand on heating (though less than liquids/gases generally). "Contract" and "contract if they're liquids or gases" are incorrect as heating leads to expansion (particles move more, occupy more space) rather than contraction. So the correct option is the one stating "expand".

Answer:

B. expand (assuming the options are labeled as A: expand if they're liquids or gases, B: expand, C: contract, D: contract if they're liquids or gases)