Question

ms. sloans students are studying changes and heat energy in science. they have recently made models of the water cycle and learned how the sun can turn liquid water into steam. they used some ice cubes from the freezer and let them melt on the lab table. next ms. sloan put out the hot plate and put some sugar cubes in a pan, she began heating the sugar cubes. 5 minutes after heating, 10 minutes after heating. how does this experimental compare to the changes the students have already seen in class? a. heating the sugar did not affect the solid sugar cubes. b. heating the solid sugar cubes caused evaporation and the sugar disappeared. c. heating the sugar caused something new to form and a chemical change to occur. d. heating the solid sugar cubes caused melting and a physical change to occur.

Explanation:

When sugar cubes are heated, a chemical change occurs as new substances are formed. Initially, heating solid sugar cubes does not affect them, but as heating continues, evaporation and the formation of new substances take place, indicating a chemical change rather than just a physical change like melting.

Answer:

B. Heating the solid sugar cubes caused evaporation and the sugar disappeared and something new to form and a chemical change to occur.