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

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

Both are only physical changes
Both are only physical changes

Both conserve mass
Both conserve mass

Both are chemical changes
Both are chemical changes

Both are changes in state

1 answer

The correct response for what these two changes have in common is:

  • Both conserve mass.

Here's a brief overview of why the other options are not correct:

  • Both are only physical changes: This is incorrect. Rust forming on a metal gate is a chemical change, while snails growing shells is a biological process that involves both physical and chemical changes.

  • Both are chemical changes: This is incorrect as only rust formation is a chemical change.

  • Both are changes in state: This is incorrect because neither of these examples specifically refers to a change in state (like solid to liquid or gas).

Therefore, the only applicable option is that both processes conserve mass.