rocks, minerals, soil Flashcards
scientist who study rocks are…
geologists
what are rocks made up of
grains of different minerals
what is mineral made of
one chemical substance each
what are the minerals in granite
quartz, feldspar, mica
glassy crystals in granite
quartz
large pink and white crystals
feldspar
small black
mica
what is soil made of
small particles of rock and minerals
dung
what is humus
all things that come from living things
sand particles are…
large
clay particles are…
small
how much air space in sand
big air space
air space in clay
tiny
proportion of what in a soil affects its properties
clay and sand
how are ignoues rocks formed
when magma cools down and solidifies into a rock
what happens if magma cools slowly
large crystals from
what happens when magma cools fast
small or no crystals from
how are sedimentary rocks formed
layers of fragment of rocks or mud collect on sea bed.
more layers build on them
new layers press layers together
solid rock forms`
what is limestone made of
little fragments of shells and grains of calcium carbonate
how is metamorphic rock fromed
heat and pressure on exsting rocks
limestone = ? metamorphic
marble
sandston = ?
quartzite
rocks are worn away by…
weathering
what is chemical weathering
erosion caused by chemical reactions
