Rocks 1
What can we use rocks for?
Example: to build houses
What are rocks made of?
What does solidify mean?
To become solid
Igneous rocks are formed by _____
magma
Are metamorphic rocks originally sedimentary rocks, igneous rocks, or a mixture of the two?
A mixture of the two
rocks
Are all rocks made up of the same number of minerals?
No
Sedimentary rocks are formed by _______ carried by rivers. These ______ fall to the bottom of lakes, seas and oceans and then solidify to become rocks.
sediments
How does magma get to the surface of the earth?
On a bus
just joking!
From a volcanic eruption. It cools and becomes an igneous rock.
Sedimentary and igneous rocks are transformed by _____ and _____ over time to become metamorphic rocks.
heat and pressure
A rock made up of only one mineral: calcite
Marble
Rocks are classified into how many groups?
1, 2, or 3?
Sedimentary
igneous
metamorphic
What very ancient thing is often found in sedimentary rocks? Clue: think of the Jurassic era
fossils
A dark or black igneous rock
basalt
A metamorphic rock used for floors or work surfaces
marble
A rock made up of 3 different minerals: quartz, feldspar and mica.
Granite
What do we use chalk for?
To write things on the board
Can you name 4 things you can find in sedimentary rocks?
Fossils
limestone
sandstone
shale
An igneous rock used to build houses
granite
Can you complete these metamorphic rock names?
mar_l_
qua_z_te
sla_e
_neiss
marble
quarzite
slate
gneiss
What do we use marble for?
For floors and work surfaces
What do we use granite for?
To build houses
What do we use slate for?
To build roofs of houses
A rock with lots of holes in it, caused by gases present during volcanic eruptions
pumice