Sandra and her dad go to the grocery story. As they do their shopping, Sandra's dad asks her about her homework. Sandra remembers that she is supposed to make a list of "real world" examples of energy transfer.

Question

Which of the following could be included on a list of examples showing an energy transfer to an object?

(2 points)
This DOES show an energy transfer to an object. This does NOT show an energy transfer to an object.
Sandra's dad stands still while he thinks about what is on the grocery list.

Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf.

Sandra sees a new kind of breakfast pastry sitting on a high shelf.

Sandra's dad pushes the grocery cart to make it start moving.

Answer 1

To determine which actions show an energy transfer to an object, we can analyze each statement:

1. Sandra's dad stands still while he thinks about what is on the grocery list.

   • This does NOT show an energy transfer to an object.
     (He is not transferring energy to any object; he is simply standing still.)

2. Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf.

   • This DOES show an energy transfer to an object.
     (When Sandra slides the gallon of milk, she is applying force and transferring energy to it.)

3. Sandra sees a new kind of breakfast pastry sitting on a high shelf.

   • This does NOT show an energy transfer to an object.
     (Seeing does not involve the transfer of energy; it is simply a visual observation.)

4. Sandra's dad pushes the grocery cart to make it start moving.

   • This DOES show an energy transfer to an object.
     (By pushing the cart, he is applying force and transferring energy to make it move.)

Summary:

• Examples that show an energy transfer to an object:

  • Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf.
  • Sandra's dad pushes the grocery cart to make it start moving.

• Examples that do NOT show an energy transfer to an object:

  • Sandra's dad stands still while he thinks about what is on the grocery list.
  • Sandra sees a new kind of breakfast pastry sitting on a high shelf.