The Earth’s Crust and Mantle

Question 1

tectonic

Answer 1

relating to the structure of the surface of the earth and the way it is formed, changed, and moved by forces inside it

Question 2

mantle

Answer 2

the part of the earth that surrounds the central core

Question 3

crust

Answer 3

a thin hard dry layer on the surface of something

Question 4

viscous

Answer 4

A viscous liquid is thick and sticky and does not flow easily.

Question 5

silicate

Answer 5

one of a group of common solid mineral substances that exist naturally in the earth

Question 6

seismic

Answer 6

relating to, or caused by an earthquake (= sudden violent movement of the earth’s surface)

Question 7

abruptly

Answer 7

in a sudden, unexpected, and sometimes unpleasant way

Question 8

smooth

Answer 8

having a surface or consisting of a substance that is perfectly regular and has no holes, lumps, or areas that rise or fall suddenly

Question 9

hazard

Answer 9

something that is dangerous and likely to cause damage