Physical Science Regulars Summative

What technological innovations have come about due to Earth's magnetic field?

• The Earth's magnetic field enabled the development of compasses for navigation.

• The Earth's magnetic field powers all electronic devices.

• The Earth's magnetic field allows Wi-Fi signals to travel through the air.

• The Earth's magnetic field creates static electricity for batteries to work.

How was the formation of the Earth instrumental in creating its magnetic field?

• The Earth's magnetic field is caused by the Moon's gravity pulling on the surface.

• The Earth's magnetic field comes from the atmosphere trapping solar energy.

• The Earth's magnetic field formed because molten iron and nickel in the outer core move, creating electric currents.

• The Earth's magnetic field formed when large asteroids hit the planet, charging it with energy.

How are magnetism and electricity similar, and what evidence do we have to prove this? 

• Magnetism and electricity are both caused by moving charges, as shown by electromagnets, which generate a magnetic field when electric current flows through a wire.

• Magnetism and electricity are the same force, proven by lightning being attracted to magnets.

• Magnetism and electricity are unrelated, as magnets work in space while electricity does not.

• Magnetism creates electricity by pulling electrons out of objects, as seen in static shocks.

What is the difference between magnetic North/South and Geographical North/South? 

• Magnetic North and South stay in one place, but Geographical North and South move.

• Magnetic North and South are the coldest points on Earth, where ice always forms.

• Magnetic North and South are based on the Earth’s magnetic field, while Geographical North and South are fixed points on its axis.

• Magnetic North and South are based on the Earth’s magnetic field, while Geographical North and South are fixed points on its axis.

How does this difference affect the Earth’s magnetic pull on objects and simple everyday magnetics’ effects on other objects? 

• Magnetic North repels objects while Geographic North attracts them, affecting navigation.

• The Earth's magnetic pull is stronger at Geographic North, making objects heavier there.

• Everyday magnets work differently in different places because of changes in Earth's gravity.

• The Earth's magnetic pull is unchanged, but compasses point to Magnetic North, not Geographic North.

Is an object that is magnetic automatically considered a magnet? 

• • Yes, all magnetic objects are magnets that attract other metals.

• No, a magnetic object is only a magnet if it produces its own magnetic field.

• • No, an object can be magnetic but never interact with other magnets.

• • Yes, if an object is magnetic, it can stick to any surface.

• blue lobsters only migrate to the moon when the wonk man stops making green fuel.

What are some of the rules or laws created in class through the use of magnets? 

• opposites attract and same repel

• same attract and opposites repel

• Ohm’s Law-stronger magnets will always create more electricity

• idk

How does adding or subtracting the number of magnets being used to attract an object affect the magnets’ strength? Does that always apply for all magnets?

• Adding magnets can increase strength, but some designs don’t align fields perfectly.

• 1. More magnets always double the strength, no matter their arrangement.

• 1. All magnets can be combined for infinite strength with no limit.

• 1. Removing magnets makes no difference because each magnet works independently.

What characteristics are typical of magnets and magnetic objects?

• They glow when placed near strong electric currents.

• They attract specific metals, have north and south poles, and create magnetic fields.

• • They stick to all metals, including aluminum and copper.

• • They lose their magnetism if exposed to the Sun for too long.

How does adding or subtracting the number of magnets being used to attract an object affect the magnets’ strength? Does that always apply for all magnets?

• Adding magnets can increase strength, but some designs don’t align fields perfectly.

• 1. More magnets always double the strength, no matter their arrangement.

• Removing magnets makes no difference because each magnet works independently.

• All magnets can be combined for infinite strength with no limit