DCA 1 Review

Magnets can attract: ​ (a)   , ​ (b)   , and​ (c)   .

• iron
• steel
• nickel
• plastic
• paper
• water
• aluminum

A student pushes a book across their desk. When will the book stop moving?

• When another student pushes it.

• When gravity pulls it down.

• When an opposite force acts on it.

• It will never stop moving.

Will the rope in the image move?

• Yes, the forces on the rope are unbalanced.

• Yes, the forces in the rope are balanced.

• No, the forces in the rope are unbalanced.

• No, the forces in the rope are balanced.

Marco says a south and a south pole will attract. Nancy says a south and a south pole will repel.

Make a claim that states who is correct. Provide evidence of your claim.

Opposite poles ​ (a)   . Same poles ​ (b)   .

• attract
• repel
• stay still
• move

A force is a

Ty'aja has a pile of toys in a room. One day, she accidentally dropped a container of paper clips in her toys. Ty'aja decides to use a magnet to help find the paper clips.

How would using a magnet help Ty'aja collect the paper clips?

• Magnets will repel the paper clips and push them out of the toys.

• Magnets will attract the paper clips and pull them out of the toys.

• Magnets will cause the paper clips to float in the air.

• Magnets will not help Ty'aja collect the paper clips.