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Science > Magnets > Flashcards

Magnets Flashcards

0
Q

What is a magnet

A

Anything that attracts iron and materials that contain

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1
Q

What is magnetism

A

The attraction or repulsion of a magnet

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2
Q

What does Fe mean

A

Iron

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3
Q

When all of the domains are lined up the object becomes____

A

Magnetized

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4
Q

Magnets have two ends. Each one is called ____

A

Magnetic poles

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5
Q

One end if the magnet always points ____ and the other end points ____

A

North

South

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6
Q

Opposites ____ likes____

A

Attract

Repel

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7
Q

What are the steps to sea floor soreading

A

Ocean floor rock is formed by molten material that seeps through a crack in the ocean floor. The magnetic material in the molten rock lined up with the direction of earths magnetic field. When the rock cools it creates a permanent record of magnetic field.

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8
Q

What is a deep ocean trench

A

Deep under water canyon that forms where oceanic crust bends and subduction takes place here

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9
Q

What is the evidence for sea floor spreading

A

Molten material
Magnetic stripes
Drilling samples

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10
Q

What is subduction

A

Process by which oceanic crust sinking beneath trench into the mantel.

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11
Q

Where does sea floor speeding begin

A

Mid ocean ridges

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12
Q

What is the magnetosphere caused by

A

Solar wind

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13
Q

What is an aurora

A

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

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14
Q

True or false

Earths magnetic field has completely moved direction every millions of years or so

A

True

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15
Q

What is a compass

A

A device that has a magnetized needle that spins freely

16
Q

The angle between a line to the geographic North Pole and the north to which a compass points is known as what

A

Magnetic declination

17
Q

What is magnetic declination depend on

A

Your location

18
Q

What produces magnetic fields

A

The spinning electrons

19
Q

Where is the magnetic force of a magnet the strongest

A

At its poles

20
Q

Permanent magnets keep there what for a long time

A

Magnetism

21
Q

Do magnetic field lines cross

A

No

22
Q

What charge does and electron have

A

Negative charge

23
Q

True or false

Ferromagnetic materials show strong magnetic propertys

A

True

24
Q

Two south poles are brought near each other.

              Repel or attract
A

Repel

25
Q

A North Pole and a South Pole are brought near each other

              Repel or attract
A

Attract

26
Q

Two north poles are brought be reach other

A

Repel

27
Q

A South Pole is brought near a North Pole

              Repel or attract
A

Attract

28
Q

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

A

Magnetic field

29
Q

Be able to draw a magnetic field around a magnet

A

http://images.tutorvista.com/content/magnetic-effects-electric-current/bar-magnet-magnetic-field.jpeg

30
Q

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

A

Combined field

Science (17 decks)

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