introduction (LEC 1)

Question 1

oceanic crust:
homogeneity
made of
length
density

Answer 1

homogenous
basalt
7km
density = 3 g/cm3

Question 2

continental drift

Answer 2

continents have moved through time to their current position

Question 3

mantle:
how much of earths volume
length
what rock is made of
density

Answer 3

82% of earth’s volume
2900km
upper mantle is peridotite
density = 3.3g/cm3

Question 4

by increasing the temp, the mechanical strength of rocks increases or decreases?

Answer 4

strength of rocks decrease

Question 5

by increasing confining pressure, the mechanical strength of rocks increases or decreases?

Answer 5

strength of rocks increases

Question 6

who proposed the theory of the continental drift

Answer 6

german geologist and meteorologist, alfred wegener

Question 7

how many of earths spheres are there

Answer 7

4

Question 8

name the earth’s physical properties

Answer 8

asthenosphere
lithosphere
mesosphere
outer core
inner core

Question 9

with depth, what happens to pressure, temperature, and density

Answer 9

they all increase

Question 10

the strength of various earths material is a function of…..

Answer 10

composition
temperature
pressure

Question 11

name the earths spheres

Answer 11

hydrosphere
atmosphere
biosphere
geosphere

Question 12

how many of earths physical properties are there

Answer 12

5 layers

Question 13

what is the karman line

Answer 13

located 100km above the sea level represents the boundary between the earths atmosphere and the outer space

Question 14

what is the core made of? density?

Answer 14

iron and nickel
11 g/cm3

Question 15

earths chemical composition

Answer 15

crust
mantle
core

Question 16

4 evidences supported the continental drift theory

Answer 16

fit of the continents
fossil evidence
rock type and structural materials
paleoclimatic evidence (ancient climate)

Question 17

crust:
homogeneity
length
density
what rocks is it make of

Answer 17

non homogenous
35-70km
density = 2.7 g/cm3
upper crust: granite
lower crust: basalt

Question 18

how many of earths composition are there?

Answer 18

three layers

Question 19

name geological factors

Answer 19

earthquakes
volcanos
slope stability
flooding
erosions
groundwater

Question 20

why is the mesosphere rigid

Answer 20

the increase in pressure counteracts the effects of higher temperature and the rock gradually strengthens with depth

Question 21

what do earths physical properties depend on

Answer 21

whether the five layers are solid or liquid, weak or strong