EARTH'S CHANGING PLATES
the crust
rock formation?
sticking out from top of mountains
what type of erosion causes movement of glaciers?
erosion by ice
to stop or keep something from happening?
prevent
name a natural wonder created by flowing water.
grandcanyon
what happens to the floor when the atlantic ocean spreads every year?
the pacific ocean floor gets smaller.
a large area of land such as a continent
landmass
true or false?
erosion causes no harm to earth's surface
false
having been changed into a liquid by heat?
molten
explain the 1st step of erosion by water.
rocks are weathered down into dirt and pebbles
explain what occurs when 2 plates pass each other.
they move back and forth and form a fault line
to make or become worse?
deteriorate
what message was the author trying to inform readers about by writing erosion and earth's changing landscape?
to tell readers about the different types of erosion that change the land.
a declaration of what will happen in the future?
predictions
particles of sand and soil blowing against a rock face is considered to be what type of erosion?
erosion by wind
what makes the inner core and outer core layer similar?
both are made from nickel and iron
the_______ink ruined my clothes
permanent
true or false?
it takes very little energy for mountain ranges to form
false
mantle?
the layer on earth that is between the crust and inner core
explain what occurs when humans remove trees and plants from the land.
soil erodes and gets washed away by water
what clue in the story tells us that there was only a single landmass in the past?
earth's surface is made of landmasses...fits together like a jigsaw puzzle.
a line or limit that indicates two things are different?
boundary
what sentence in the story describes to us that people will get warnings to be safe from earthquakes
it also can give people who live near plate boundaries warnings about the next earthquake
solid matter such as rock and sand that is left somewhere by wind or water?
sediment
what sentence in the story describes to us that erosion is a slow process that can have a disastrius effect?
the light house was build in 1870....people were afraid it would collapse