1. Daily Warm-Up Exercises
Day 24
How do sedimentary rocks form?
They form when particles get compacted and cemented together.
How do sediments tend to settle?
They settle in horizontal layers, with new layers forming on top of old layers.
What does compacted mean?
to get squeezed or pressed together so it takes up less space
What does cemented mean?
to get stuck together
What do we call a chemical that cements particles together?
a cementing agent or a matrix
Daily Warm-Up Exercises 1
Daily Warm-Up Exercises 1

2. Creating a Limestone Layer (Part 3)
Investigation 5
Limestone

3. Limestone Ingredients
What ingredient is common to all limestone?
calcium carbonate (calcite)
Where does the calcite come from?
shells of marine organisms
Powder (calcite powder) that forms when organisms exhale carbon dioxide into water that contains calcium. This powder is a precipitate. This is what we learned from our limewater experiment. 3
Daily Warm-Up Exercises 3

4. Making Limestone Add a layer of limestone to your basin
Available ingredients:
oyster shells
clay
sand
plaster of paris

5. Plan Limestone Recipe Turn to the Limestone Recipe on page 39.
Select and record your ingredients.
The total of all materials is 5 spoonfuls.
At least one spoonful of sand or clay
You MUST have plaster. It is our matrix.
The mixture should be thick, not runny
too much water will dissolve the sandstone layer!!!!!

6. Observe Limestone How can you be sure that what you made is limestone?
do an acid test
Which layer in your basin is oldest?
sandstone
Where is it located?
bottom 6
Daily Warm-Up Exercises 6

7. Grand Canyon Layers Which of these layers is oldest? Tapeats Sandstone7
Daily Warm-Up Exercises 7

8. Grand Canyon Layers Which layer is youngest? Kaibab Limestone 8
Daily Warm-Up Exercises 8

9. Superposition
If you wanted to find the thing that had been in a garbage can the longest, where would you look?
on the bottom
Superposition is the idea that rock layers get older the closer they are to the bottom. 9
Daily Warm-Up Exercises 9

10. Original Horizontality
How do sediments tend to settle?
in horizontal layers, with new layers forming on top of old layers
Original horizontality is the idea that layers are deposited in a horizontal or nearly horizontal position.
Complete lab pages 39/41.

11. Daily Warm-Up Exercises
Reading
Read: Where in the World is Calcium Carbonate? Pgs and answer questions page 72 in complete sentences!
Read Coconino Stories on pages and answer questions pg. 75 in complete sentences!
Complete sentences. That means the question is restated in the answer!
Daily Warm-Up Exercises