geology test 5/29

Question 1

name some pieces of evidence for the theory of a super continent.

Answer 1

fit of the continents

mountain chains and rock types

terrestrial animals and plants

volcanoes and earthquakes locations

glacial evidence

magnetic stripes on sea floor

Question 2

how fast do continents move?

Answer 2

a couple inches a year

Question 3

which ocean is bigger? atlantic or pacific

Answer 3

atlantic

Question 4

what and where are convection currents?

Answer 4

heat flows in asthenosphere that move plates

upper mantle

Question 5

where do plates move?

Answer 5

on top of the asthenoshpere

Question 6

what are the types of motion?

Answer 6

subduction- compression (ocean-continent & ocean-ocean)

convergence- compression (only continent-continent)

divergent- tension (ocean-ocean w rift)

transform- sliding (continent-continent)

Question 7

what are some primary earthquake effects?

Answer 7

ground shaking

ground rupture

liquefaction

Question 8

what are some secondary effects of earthquakes?

Answer 8

structure collapse

fires

flooding

starvation and disease

Question 9

what does uranium-238 become when stable?

Answer 9

lead-206

Question 10

what does carbon-14 become when stable?

Answer 10

nitrogen-14

Question 11

what does potassium-40 become when stable?

Answer 11

argon-40

Question 12

what are some problems with radiometric dating?

Answer 12

loss of some of the product from weathering will change age of rock

rock contains no radioactive material

Question 13

what is relative time?

Answer 13

compares rocks or fossils to one another based on logical rules

Question 14

what is absolute time?

Answer 14

actual age of a rock or fossil in years ago

Question 15

what happens during alpha decay?

Answer 15

number -2

mass -4

Question 16

what happens during beta decay?

Answer 16

number +1

mass nothing

Question 17

what happens during electron capture?

Answer 17

number -1

mass nothing

Question 18

what is cross-cutting?

Answer 18

the object being cut is older than the object doing the cutting

Question 19

what is the law of superposition?

Answer 19

the oldest rocks are at the bottom of the stack and youngest are at the top

Question 20

what happens to the sea level when coarse is over fine?

Answer 20

it falls

Question 21

what happens to the sea level when fine is over coarse?

Answer 21

it rises