Magnetic

Can magnets interact without touching?

• Yes

• No

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The area of magnetic force around a magnet is known as its _____________.

• Magnetic Field

• Magnetic Fan Lines

• Magnetic Area

• Magnetic Location

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What will the magnets in the picture do?

• Attract

• Repel

• Neither attract nor repel

• Both attract and repel

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Permanent magnets are made out of which materials?

• Cobalt, Nickel, and Iron

• Copper, Chromium, and Cobalt

• Gold, Silver, and Platinum

• Copper, Nickel, and Iron

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What is the area around a magnet within which magnetic force is exerted called?

• Electric field

• Magnetic field

• Gravitational field

• Radiation zone

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Why are certain materials magnetic?

• Because they contain large amounts of iron, cobalt, and nickel.

• Because their molecular structure allows for the alignment of their magnetic domains.

• Because they are electrically charged.

• Because they are heavier than non-magnetic materials.

Answer explanation

Certain materials are magnetic because their molecular structure allows for the alignment of magnetic domains, enabling them to exhibit magnetic properties. This alignment is crucial for magnetism.

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NGSS.MS-PS2-3

The area of magnetic force around a magnet is known as its _____________.

• magnetic field

• magnetic declination

• magnetic fan lines

• magnetic tan lines

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What is the effect of placing a ferromagnetic material in a magnetic field?

• The material becomes demagnetized

• The material's magnetic domains align with the field

• The material becomes a permanent magnet

• The material's temperature increases

Answer explanation

When a ferromagnetic material is placed in a magnetic field, its magnetic domains align with the field, enhancing its magnetization. This alignment is the primary effect, making the material temporarily magnetized.

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Which of the following materials is considered a ferromagnetic material?

• Copper

• Aluminum

• Iron

• Plastic

Answer explanation

Iron is a ferromagnetic material, meaning it can be magnetized and has strong magnetic properties. In contrast, copper, aluminum, and plastic are not ferromagnetic.

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The Earth's magnetic field is most useful for _____.

• deflecting solar wind

• keeping track of time

• creating sunny weather

• making it look cool in front of the other planets