Question

every bit of matter is composed of atoms. atoms have negatively charged electrons spinning around them. in most atoms, the electrons spin in random directions. for this reason, the electrons nullify, or cancel, each other. in certain kinds of matter, however, the electrons all spin in the same direction, which leads to an invisible force known as magnetism. when matter is magnetic, it pulls things containing iron to itself. because steel contains a high percentage of iron, objects made with steel, such as paperclips, are drawn to magnets.
match causes with their effects.
magnets attract paperclips. electrons negate each other.
magnetism is created.
cause effect
electrons spin randomly.
electrons spin in the same direction.
steel contains iron.

Explanation:

1. For "Electrons spin randomly": The text says "In most atoms, the electrons spin in random directions. For this reason, the electrons nullify, or cancel, each other." So the effect is "Electrons negate each other."
2. For "Electrons spin in the same direction": The text states "In certain kinds of matter, however, the electrons all spin in the same direction, which leads to an invisible force known as magnetism." So the effect is "Magnetism is created."
3. For "Steel contains iron": The text mentions "Because steel contains a high percentage of iron, objects made with steel, such as paperclips, are drawn to magnets." So the effect is "Magnets attract paperclips."

Answer:

• Cause: Electrons spin randomly. Effect: Electrons negate each other.
• Cause: Electrons spin in the same direction. Effect: Magnetism is created.
• Cause: Steel contains iron. Effect: Magnets attract paperclips.