10/2/08 sorting rocks lesson #21 quick write: yesterday you observed and recorded various rock...

10/2/08 Sorting Rocks Lesson #21

Quick Write:

Yesterday you observed and recorded various rock properties (characteristics). Today you will be sorting rocks into groups. List rock properties you could use for the sort.

Announcements:•Quiz corrections due TODAY. Retakes Friday at lunch.•Diagrams can be edited and turned back in for additional credit•Scientist reports will be due October 14th


Rock Sort:

Work on either the Nankoweap rocks or the North Canyon rocks.

• How are some alike and different?

• Sort the rocks from the North Canyon and the rocks from the Nankoweap Canyon.

• Give the groups names!


North Canyon sorted by ________________ rocks ________ rocks

#__ , #__ #__ , #__, #__

#__ , #__ #__ , #__, #__

North Canyon sorted by ________

________ rocks ________ rocks

Sort the rocks from the North Canyon and the rocks from the Nankoweap Canyon. Only use one group at a time.


Lab Safety-Follow directions-Proper and careful use of materials-Safety equipment

Recall eyewash demonstration-Keep materials away from your face

We are working with dilute hydrochloric acid, HClHCl is dangerous if in contact with eyes or ingested

-Wear goggles-Gently use a small amount-Never point bottle at anyone-Clean up carefully-WASH HANDS, then remove goggles


-Demonstration of acid test

Rocks on paper towel (numbers down)

Gently wipe off an area on the rock

Gently put one drop of acid on a rock

Observe and record on yesterday’s table or as shown:

Acid test observations for ________ canyon rocks

#__: _______________ #__: _______________

#__: _______________ #__: _______________

#__: _______________ #__: _______________

Dry the rocks and table.

Wash hands, return goggles


TASK:-Perform acid test and record observations-Clean up & wash hands-Remove goggles and place in box-Sort rocks with new information

~see example chart on the board

Lab Safety-Follow directions-Proper and careful use of materials-Safety equipment-Keep materials away from your face

Working with acid-Wear goggles-Gently use a small amount-Never point bottle at anyone-Clean up carefully-WASH HANDS, then remove goggles

The acid test

• Which rocks fizzed?

• Did these rocks share other properties?


Calcite

• The material in the rock that reacted with the acid was calcite.

• Calcite is composed of Calcium

Carbon and Oxygen.

CaCO3.

• When acid reacts with calcite a gas is given off, hence fizzing.


• Did you see a gas?

• What was it?


Limestone

• This is the name given to rocks containing calcite.

• Calcite reacts with the acid and gives off a gas


Sandstone

• This is the name given to rocks that are made out of particles of sand, cemented together.

• What characteristics do these rocks have?


Shale

• Which rock # has not been mentioned?

• Shale is a fine grained rock that has splintery layers.

• Acid sits on the rock with no reaction.

• Plant fossils


Naming the rocks

• Limestone

• Sandstone

• Shale


10/2/08 sorting rocks lesson #21 quick write: yesterday you observed and recorded various rock...

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