Question

what do these two changes have in common?
deep - frying chicken
melting glass
select all that apply.
both are chemical changes. both are caused by heating.
both conserve mass. both are caused by cooling.

Explanation:

• Chemical changes: Deep - frying chicken involves a chemical reaction (e.g., Maillard reaction) that changes the chemical composition of the chicken. Melting glass is a physical change (change of state from solid to liquid), but if we consider the broader context of glass production (which may involve some chemical reactions during initial synthesis, but melting itself is physical. However, if we assume the problem is in a basic context where any non - reversible (in a simple sense) change is considered, maybe there's an error in the first option. But if we go by strict chemical change (new substance formation), deep - frying is a chemical change (new flavor compounds, etc. are formed), and if we assume some impurity reactions in glass melting (unlikely in pure melting, but if considering industrial glass melting with additives reacting, then maybe).
• Caused by heating: Both deep - frying (using hot oil, which is heating) and melting glass (requires heating to reach the melting point) are caused by heating.
• Conserve mass: According to the law of conservation of mass, in any physical or chemical change (in a closed system), mass is conserved. Deep - frying (if we assume no mass loss to the environment, which is an idealization) and melting glass (in a closed system) conserve mass.

Answer:

Both are caused by heating, Both conserve mass.