Earth MaterialsCALCITE QUEST

Lori Mitchell

Investigation #3

IT’S ROCK TIME STARRING• Basalt• Limestone• Marble &• Sandstone

Investigation # 3

• 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 trayPut 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.

READOLD 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

• 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

http://www.windows.ucar.edu/earth/Atmosphere/images/acidrain_sm.jpg

http://images.google.com/imgres?imgurl=http://www.dec.ny.gov/images/environmentdec_images/1656acidrainstone.jpg&imgrefurl=http://www.dec.ny.gov/environmentdec/18654.html&usg=__Lv0W6RpsLodmeRpVdAErcbOJYSA=&h=384&w=252&sz=62&hl=en&start=205&tbnid=PuW5MzTrBL62gM:&tbnh=123&tbnw=81&prev=/images%3Fq%3Dacid%2Brain%26gbv%3D2%26ndsp%3D20%26hl%3Den%26safe%3Dactive%26sa%3DN%26start%3D200