science 4.2 Flashcards Preview

science and social studies 6th grade > science 4.2 > Flashcards

Flashcards in science 4.2 Deck (7)
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1
Q

the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations

A

continental drift

2
Q

continents were once joined to make a single huge continent and is Greek for ‘’ all earth ‘’

A

Pangaea

3
Q

places where sea floor spreading takes place

A

Mid-ocean ridges

4
Q

the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies

A

sea- floor spreading

5
Q

When Earth’s magnetic poles change places

A

magnetic reversal

6
Q

evidence that sea floor spreading comes from

A

magnetic reversal on ocean floor

7
Q

items that provide evidence that the continents were once closer together

A

fossils