earth & space science

Question 1

crust

Answer 1

the outermost layer- it comprises of roughly 1% of the total volume of earth. it’s 10-100 kilometers thick

Question 2

mantle

Answer 2

comprises more than 75% of earths volume, it’s roughly 3000 kilometers thick. contains mostly iron, magnesium, and calcium

Question 3

core

Answer 3

nearly twice as dense as the mantle. has two distinct parts- a 2200 kilo thick liquid outer core and a 1300 kilo solid inner core

Question 4

lithophere

Answer 4

crust and rigid upper part of the mantle- it consists of 30 separate pieces called plates

Question 5

asthenosphere

Answer 5

the more movable mantle below the lithosphere

Question 6

fault lines

Answer 6

places where the plates slide along each other `

Question 7

richter scale

Answer 7

aka moment magnitude scale. scientist use this scale to measure the intensity of an earthquake

Question 8

what are the 3 types of rocks?

Answer 8

igneous, sedimentary, and metamorphic

Question 9

precambrian eon

Answer 9

the period of time before the fossil record began

Question 10

water cycle

Answer 10

aka hydrologic cycle. it involves the movement of water in all surface of matter through the atmosphere and back to the Earth

Question 11

evaporation

Answer 11

when water becomes gas

Question 12

transpiration

Answer 12

when water evaporates into the atmosphere from the leaves of plants

Question 13

precipitation

Answer 13

when the clouds become too heavy, they release snow and ice

Question 14

the carbon cycle

Answer 14

helps maintain Earths ecosystem