What do these two changes have in common? Select all that apply.

Question

rust forming on a metal gate
snails growing shells
(1 point)
Responses

Both are only physical changes
Both are only physical changes

Both are chemical changes
Both are chemical changes

Both conserve mass
Both conserve mass

Both are changes in state..

Answer 1

The two changes you mentioned have the following in common:

• Both conserve mass: This principle is true in both cases; the total mass of the system remains constant in accordance with the law of conservation of mass.

The other options do not apply:

• Both are only physical changes: Rust forming on a metal gate is a chemical change (oxidation), while snails growing shells involves biological processes that can be considered physical changes.

• Both are chemical changes: Only rust formation is a chemical change; snails growing shells is a physical change related to their biological growth processes.

• Both are changes in state: This is not applicable, as rust formation does not involve a change in physical state (like solid, liquid, gas), whereas shell growth does not typically involve a phase transition in the classic sense.

So, the main commonality is that both conserve mass.

Answer 2

2 answers

Answer 3

Sure! The two changes have the following in common:

1. Both conserve mass: The mass of the reactants equals the mass of the products in a closed system according to the law of conservation of mass.

2. Both are changes in state: This can refer to the fact that both processes can be viewed in terms of changes in structure (though they may not fit the traditional definitions of physical states like solid, liquid, or gas) — rusting involves the metal changing to a different form, and snails' shells can be seen as evolving structures as they grow.

However, if strictly interpreted with traditional definitions, you could also say they may not both fit into the "changes in state" concept so directly.

Thus, if you could only pick two more specific categorizations based on traditional definitions, it may be adequate to state:

• Both conserve mass
• (Choose either) Both involve physical changes or Both involve biological processes depending on how you view the snail's shell growth.

Let me know if you need further clarification!