Magnetism Quiz

Which of these determines whether or not a material is magnetic?

• the density of the material

• the weight of the material on Earth

• the alignment of atoms in the material

• the number of elements that make up the material

A magician wants to use magnets to create a new illusion for her show. She plans to hide strong magnets in her shoes and inside a special rug on the stage. When she tests the illusion, she finds that her shoes stick to the rug. What will happen if she flips the poles of the magnets in each of her shoes?

• Her shoes will float above the rug.

• Her shoes will still be stuck to the rug.

• Her shoes will no longer be affected by the rug.

• Her shoes will stick to each other instead of to the rug.

The attractive force between two magnets increases. Which statement explains why this would happen?

• The like poles of the magnets are pointed at each other and move farther apart.

• The like poles of the magnets are pointed at each other and move closer together.

• The unlike poles of the magnets are pointed at each other and move farther apart.

• The unlike poles of the magnets are pointed at each other and move closer together.

Candice claims that all magnets have two magnetic poles. Which of these observations would best support her claim?

• Iron is attracted to a magnet but not to other pieces of iron.

• When a bar magnet is cut in half, each half has a north pole and a south pole.

• The north pole of a compass needle is attracted to the south pole of a bar magnet.

• The strength of the magnetic force from a bar magnet decreases as the magnet is pulled away from another object.

Ajit has a bar magnet, a copper rod, an iron rod, and a steel rod. First, he moves the magnet toward the middle of the copper rod. Next, he moves the magnet toward the middle of the iron rod. Finally, he moves the magnet toward the middle of the steel rod. In each step of his investigation, he writes down his observations. Describe the goal of Ajit’s investigation.

• To determine which rod is the heaviest.

• To find out which rod is the most magnetic.

• To see if the magnet can lift the rods.

• To measure the length of each rod.

Identify one way Ajit can improve his investigation.

• Use a larger magnet.

• Test more types of rods.

• Measure the temperature of the rods.

• Use a different type of magnet for each rod.

Which two metals will be attracted by a magnet?

• iron and steel
• gold and silver
• aluminum and lead
• copper and cobalt

Tags

NGSS.3-PS2-3

NGSS.5-PS1-3

Like/same poles __________ each other while unlike/opposite poles ___________ each other.

• repel, attract
•  attract, repel
•  love, hate
• oppose, connect

Tags

NGSS.3-PS2-3

Explain how the Earth's magnetic field affects a compass needle.

• The Earth's magnetic field aligns the compass needle with the magnetic north and south poles.

• The Earth's magnetic field repels the compass needle.

• The Earth's magnetic field has no effect on the compass needle.

• The Earth's magnetic field demagnetizes the compass needle.

Tags

DOK Level 2: Skill/Concept

Which of the following materials is commonly used as the core in an electromagnet?

• Aluminium

• Copper

• Iron

• Plastic

Answer explanation

Iron is commonly used as the core in an electromagnet because it is a ferromagnetic material, which enhances the magnetic field when an electric current passes through the coil surrounding it.