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Science > Magnets > Flashcards

Magnets Flashcards

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0
Q

Where is the magnetic force of a magnet the strongest

A

At the poles

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1
Q

What is a magnet

A

A magnet is any material that attracts iron and any material tha contains iron

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2
Q

Do two south poles that are brought together repel or attract

A

Repel

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3
Q

Does a North Pole that is brought near a South Pole repel or attract

A

Attract

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4
Q

Do two north poles that are brought near each other repel or attract

A

Repel

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5
Q

When the magnetic fields of two or more magnets overlap, what is the result

A

A combined field

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6
Q

Do magnetic field lines ever cross

A

No

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7
Q

Is the following sentence true or false? The magnetic declination of a location never changes

A

False

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8
Q

What particles of an atom have a negative charge

A

Electrons

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9
Q

Is the following sentence true or false? The domains of a magnet are arranged in the same direction

A

True

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10
Q

IsThe following sentence true or false? Every million years earths magnetic field changes direction

A

True

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11
Q

What is the definition of magnetosphere

A

The region of earths magnetic fields shaped by the solar wind

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12
Q

What is the evidence for sea floor spreading

A

Molten material, magnetic stripes, drilling samples

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13
Q

What is subduction

A

Process where oceanic crust sinks down beneath trench into mantle

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14
Q

Who’s the person who had the theory about the sea floor spreading

A

Harry Hess

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15
Q

What is the deep ocean trench

A

Deep underwater canyon

16
Q

Where does the deep ocean trench form

A

Where Oceanic crust bends

17
Q

What takes place at the deep ocean trench

A

Subduction

18
Q

What is the definition of aurora

A

A glowing region in the atmosphere caused by charged particles from the sun

19
Q

What is the definition of ferromagnetic

A

Material that shows strong magnetic properties

20
Q

What is the definition of a permanent magnet

A

A magnet that keeps its magnetism for a long period of time

21
Q

What can earth make magnets out of

A

Ferromagnetic material

22
Q

Is the following statement true or false? Not all magnets are made of pure iron

A

True

23
Q

Where is the magnetic force of a magnet strongest

A

At the polls/where the magnetic field lines are closest

24
Q

The region of magnetic force around a magnet is known as its

A

Magnetic field

25
Q

What are the lines called that map out the magnetic field around a magnet

A

Magnetic field lines

Science (8 decks)

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