Transcript Earth Materials

Earth Materials
CALCITE QUEST
Lori Mitchell
Investigation
#3
IT’S ROCK
TIME
STARRING
• Basalt
• Limestone
• Marble &
• Sandstone
Investigation # 3
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Materials needed
1 FOSS tray
4 sticky notes
Small basalt
Small limestone
Small Marble
Small Sandstone
ROCK TIME
• Each group member will select a rock and
write the name on it on both sides of the
sticky note. (basalt, limestone, marble,
sandstone)
• What would a geologist do given four new
rocks to study?
• On page 10 of the Earth Materials Booklet
record your observations of each rock.
• All of the samples are rocks.
• Now come and get a sample of one of the
minerals we used from the last test.
• Can you name the mineral?
• CALCITE
What is cool about Calcite?
• Each group needs 5 vials, a syringe, and a
container of vinegar
• Put the calcite in a vial
• Carefully add 25ml of vinegar to the vial
with the calcite.
• Observe and record what happens on
page 11.
Which rocks do you think contain
calcite?
• Put the four vials into the corner sockets in
the FOSS tray
Put one rock sample in each vial.
• Carefully add vinegar to each vial until the
level is about 1 cm from the top(25 ml)
• Observe and record what happens.
REPORT RESULTS
• Put a check next to the rocks that you
think contain calcite.
• Do we need another test?
• Let’s let them sit overnight and then check
them for more clues.
READ
OLD MAN
AND A ROCK
Is there
another test
WE can do to
know for
sure which
rocks
contain
calcite?
EVAPORATION
HOW WILL YOU KNOW?
• If something is left in the dish after the
liquid has evaporated, how will you
know it is evidence that calcite was in
the rock and not just something else?
PART 2
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Materials needed
Each group needs their FOSS tray
6 evaporation dishes
Plastic cup with vinegar
syringe
Two new sticky notes
Set up the investigation
• Put vinegar only in one dish and label
• Put the liquid from the calcite vial into
another dish and label. (These are your
controls.
• Follow the same procedure for the rock
vials.
• Clean up.
LOOKING FOR EVIDENCE
• Observe the dishes being careful not to
break any deposits.
• Compare the rock deposits to the calcite
and vinegar.
• Draw your observations on page 12 of
your Earth Materials Notebook.
• Share observations
Looking for evidence
• Did you find a deposits of white crystals in
the calcite, limestone, and marble dishes?
• Is there just a slight residue in the vinegar,
basalt, and sandstone dishes.
• Did you notice the needlelike crystals?
DISCUSSION TIME
• Where did the calcite in the dish come
from?
• How long did it take the calcite to
dissolve?
• Would limestone and marble be affected
by acid rain?
• Would these rocks erode faster or slower if
the rainwater did not contain acid?
ACID RAIN
Effects of Acid Rain on Buildings
and Monuments
Rock Types
• Basalt: a dark, fine-grained rock that began as molten lava
extruded from a volcano or rift and then cooled quickly on
the earth’s surface.
• Granite: an igneous rock that forms when magma (molten
rock) forms deep in the Earth’s crust.
• Limestone: one common sedimentary rock – has a wide
variety of colors, textures, & origins and consist mostly of
mineral calcite. They form where water is present.
• Marble: a metamorphic rock, is limestone that has been
altered by heat & pressure – usually white by tinted by
other minerals – often used as columns or countertops
• Mock rock: forms from common ingredients found in your
kitchen (flour, salt, water, food coloring, & alum) and
neighborhood (sand, gravel, & shells) - resemble concrete
• Sandstone: a sedimentary rock formed when rocks such
as granite are eroded by wind, water, & ice – used as a
building stone.
Bibliography
•www.fossweb.com
s.ucar.edu/earth/Atmosphere/images/a
ml&usg=__Lv0W6RpsLodmeRpVdAErcbOJYSA