Question

what do these two changes have in common? mixing chocolate syrup into milk knitting yarn into a scarf select all that apply. both conserve mass. both are chemical changes. both are changes of state. both are caused by heating.

Explanation:

Knitting yarn into a scarf is a physical change as it only changes the shape of the yarn. Mixing chocolate syrup into milk is also a physical change as it is a mixture - no new substances are formed. In both cases, the law of conservation of mass holds true. There is no chemical reaction (no new substances formed), no heating - caused change, and no change of state.

Answer:

Both conserve mass.