Question

what do these two changes have in common? picking up a paper clip with a magnet dry ice sublimating and becoming a gas select all that apply. both are caused by cooling. both are caused by heating. both conserve mass. both are only physical changes. understand conservation of matter using graphs identify physical and chemical changes not feeling ready yet? these can help: work it out compare thermal energy transfers

Explanation:

Picking up a paper - clip with a magnet is a physical change as it involves a magnetic force interaction without altering the chemical composition of the paper - clip or the magnet. Dry ice sublimating into a gas is also a physical change as it is a phase change from solid to gas without changing the chemical identity of carbon dioxide (dry ice). In physical changes, mass is conserved. These changes are not caused by cooling or heating in the sense of chemical reactions, and they are not chemical changes.

Answer:

Both conserve mass, Both are only physical changes