Is rice krispies treats a mixture?

Yes, Rice Krispies treats are a mixture. Here's why:

* Components retain their identities: The individual components of the treat (Rice Krispies cereal, butter, marshmallows, and sometimes other ingredients) can still be identified. You can see the Rice Krispies, the melted marshmallows, and even the individual butter molecules if you looked closely enough.

* No new substances are formed: The process of combining the ingredients doesn't create any new chemical substances. It's just a physical change, with the components sticking together due to the melted marshmallows acting as a binder.

Therefore, Rice Krispies treats are a mixture, specifically a heterogeneous mixture, because the components are not evenly distributed throughout.