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Natrual Science > Definitions > Flashcards

Definitions Flashcards

1
Q

Magnetic North

A

North that magnets point to

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2
Q

True North

A

furthermost point north on Earth

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3
Q

North & North pole
South & South pole

A

Like poles - repel

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4
Q

North & South pole

A

unlike poles - attract

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5
Q

Directional properties of magnets

A

North will always point north

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6
Q

Magnetic field

A

space around the magnet in which magnetic forces act.

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7
Q

attractive force of a magnet

A

Magnets attract objects made of iron, steel, cobalt, nickel

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8
Q

Pangaea

A

all earth (world one big continent)

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9
Q

Continental Drift

A

theory where all continents were all joined up and are now separate.

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10
Q

convection currents

A

hot liquid rises, cold liquid sinks

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11
Q

Faulting

A

the cracking of rocks

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12
Q

palaeontologists

A

scientist that digs up fossils

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13
Q

body fossils

A

where there is actually some portion of the fossil remaining (bones, teeth)

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14
Q

trace fossils

A

no portion of actual fossil but traces (molds,animal tracks,impressions)

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15
Q

Metamorphic rocks

A

made with great heat and pressure

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16
Q

igneous rocks

A

spewed out from volcanoes, cooled down lava

17
Q

sedimentary rocks

A

sediment layes building up

18
Q

mohs hardness scale

A

classify rocks by how hard they are

19
Q

weathering

A

breaks down rocks

20
Q

erosion

A

moves rocks & soil away

21
Q

physical weathering

A

breaks down rocks physical structure

22
Q

chemical weathering

A

breaks down rocks chemical structure (make rocks more brittle & soft)

23
Q

revolution

A

earth orbits sun

24
Q

rotation

A

moon orbits earth

25
Q

phases of the moon

A

The moon looks like it is changing shape

26
Q

20 July 1969

A

day man 1st walked on the moon

Natrual Science (5 decks)

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