September 11th DOL

Look at the image of a magnet and a metal pin. What will happen if the magnet is moved closer to the pin?

• The magnet will push the pin away from it.

• The magnet will pull the pin toward it.

• The magnet will push the pin to the ground.

• The magnet will pull the pin to the ground.

A metal ball is hanging by a string. How could you make the ball move without touching it or moving the string?

• Place a magnet near the metal ball to make it fall to the ground.

• Hang the ball from a longer string so gravity pushes it down.

• Tape the string to a wall so gravity pulls it upward.

• Place a magnet near the metal ball to pull it toward the magnet.

Look at the drawing. A student places three magnets on a stick. The magnets are arranged as shown. Choose the words to complete the sentences. The student explains their observations as follows. Magnets A and B have a noncontact force that causes them to __________. Magnets B and C have a noncontact force that causes them to __________.

• Attract; attract

• Repel; repel

• Repel; neutral

• Repel; attract

• Attract; repel

Which of the following conclusions can be made about the strength of each magnet based on the information above?

• A. Magnet A is stronger than Magnet B because it picked up the most paper clips.

• B. Magnet B is stronger than Magnet A because it picked up the least paper clips.

• C. Magnet A is stronger than Magnet B because it picked up the least paper clips.

• D. Magnet B is stronger than Magnet A because it picked up the most paper clips.

Zola wants to see how many small pieces of paper her magnet can hold up on the refrigerator all at once. Which of the following explains what she should do?

• A. Starting with a stack of paper, apply different magnets to the bottom of the stack until one of the magnets can hold the entire stack.

• B. Starting with one piece of paper, apply the magnet to the top of the paper on the refrigerator and keep adding identical pieces of paper under the magnet, one at a time.

• C. Starting with a stack of different kinds of paper, apply the magnet to the top of the papers on the refrigerator and keep decreasing the amount of paper.

• D. Starting with one piece of paper, apply the magnet to the bottom of the paper on the refrigerator and keep adding five pieces of the same type of paper at a time.