Game: Rock Quiz
Equipment: 1 set of cards per team
Cubs line up in relay formation at one end
of the hall. Place the cards for each team
at the other end of the hall.
One at a time Cubs retrieve a card from
the team pile. Once all the cards are
retrieved the Cubs work together to place
the picture of the rock, with it’s type, and
description of how it is formed.
The team with the most correct cards is
the winner.
Conglomerate—made up of
rounded pebbles cemented together
Sandstone—sand grains cemented
together into solid stone
Shale—silt particles
cemented
Marble—is a metamorphic rock that
comes from limestone or dolomite
Slate—is a fine grained
metamorphic rock
Gneiss—a medium to course
grained metamorphic rock
Basalt —is a hard,
black volcanic rock
Obsidian—is usually back in colour.
It is a dense volcanic glass.
Rhyolite—is a light-coloured
volcanic rock
Sedimentary
Metamorphic
Igneous
These rocks are formed
from particles of sand,
shells, pebbles, and other
fragments of material.
May be soft and break apart
or crumble easily.
These rocks are formed
under the surface of the
earth from the change that
occurs due to intense heat
and pressure. These rocks
often have ribbon like layers
and may have shiny
crystals.
These rocks are formed
when magma cools and
hardens. May look shiny and
glasslike. Sometimes gas
bubbles are trapped in the
rock while forming leaving
tiny holes and spaces in the
rock.
Types of Rocks
Rocks are not all the same!
The three main types, or classes, of rock are sedimentary, metamorphic, and igneous and the differences among
them have to do with how they are formed.
Sedimentary
Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of material. Together, all
these particles are called sediment. Gradually, the sediment accumulates in layers and over a long period of time
hardens into rock. Generally, sedimentary rock is fairly soft and may break apart or crumble easily. You can often see
sand, pebbles, or stones in the rock, and it is usually the only type that contains fossils.
Examples of this rock type include conglomerate and limestone.
Metamorphic
Metamorphic rocks are formed under the surface of the earth from the metamorphosis (change) that occurs due to
intense heat and pressure (squeezing). The rocks that result from these processes often have ribbon like layers and
may have shiny crystals, formed by minerals growing slowly over time, on their surface.
Examples of this rock type include gneiss and marble.
Igneous
Igneous rocks are formed when magma (molten rock deep within the earth) cools and hardens. Sometimes the
magma cools inside the earth, and other times it erupts onto the surface from volcanoes (in this case, it is called
lava). When lava cools very quickly, no crystals form and the rock looks shiny and glasslike. Sometimes gas bubbles
are trapped in the rock during the cooling process, leaving tiny holes and spaces in the rock.
Examples of this rock type include basalt and obsidian.