For each of the scenarios below, describe what the unconditioned stimulus (UCS), unconditioned response (UCR), the conditioned stimulus (CS), and conditioned response (CR) are.

1.) Opening a can of pet food with a can opener leads your pet to start jumping around.
2.) Smelling a perfume you wore during a great party makes you smile and feel good.
3.) Walking by the gym where you hurt yourself working out makes you wince.
4.) You cringe when you pass the intersection where you nearly had a car accident.
5.) A song reminds you of a former friend or romantic partner.