Earth's Internal heat

Question 1

geologists have drilled holes as much as ___ deep into earth

Answer 1

12km

Question 2

for every __ meters that you descend from the point of __ meters below earth’s surface, the temperature rises __°C

Answer 2

40, 20, 1

Question 3

also known as the earth’s outer skin. a layer of solid rock that includes both dry land and ocean floor

Answer 3

crust

Question 4

the oceanic crust consists mostly of rocks such as

Answer 4

basalt. a dark rock with a fine texture

Question 5

the continental crust is a crust that forms the continents. it consists mainly of rocks such as

Answer 5

granite. a rock light in color and has a coarse texture

Question 6

below the earth’s crust, the mantle is made up of rock that is very hot but solid. the mantle is nearly ____ thicc

Answer 6

3000 km

Question 7

the upper most part of the mantle and the crust together

Answer 7

lithosphere

Question 8

a layer that is hotter and under increasing pressure. somewhat soft and can bend like plastic

Answer 8

asthenosphere

Question 9

the theory that states that gases and dust of cloud was attracted by gravitational energy

Answer 9

accretion theory

Question 10

50% of earth’s internal heat comes from

Answer 10

uranium - 238
uranium - 235
thorium - 232
potassium - 40

Question 11

an object formed from dust, rock, and other materials

Answer 11

planetisimal

Question 12

transfer heat from one place to another by mass motion of a fluid such as water, air, or molten rock.

Answer 12

convection currents

Question 13

1 of 2 or more species of atoms of a chemical element with the same atomic number and identical chemical behavior but with different atomic masses and properties

Answer 13

isotope

Question 14

majority of heat transfer occur at

Answer 14

mid oceanic ridges

Question 15

process by which an unstable atomic nucleus loses energy by radiation

Answer 15

radioactive decay