Question

freida wants to model the way atoms move when a substance changes its state. to do this, freida makes a pyramid of marshmallows. then, she knocked down the pyramid causing the marshmallows to fall. if the marshmallows represent the atoms in the substance, which change of state is freida modeling? melting freezing condensation deposition

Explanation:

• In a solid, atoms are closely packed and have a fixed arrangement (like the marshmallow pyramid).
• When a substance melts (changes from solid to liquid), the atoms gain energy and move more freely (like the marshmallows falling).
• Freezing is liquid to solid (atoms getting closer - opposite of the model).
• Condensation is gas to liquid (not relevant to the solid - like start of the model).
• Deposition is gas to solid (also not relevant to the solid - like start of the model).

Answer:

melting