DOL Sedimentary Formation 3-5-25

Which of the following statements describes the first step in the formation of sedimentary rocks?

• Erosion
• Metamorphism
• Volcanism
• Sedimentation

What is the correct order of the age of the rock layers shown above from youngest to oldest?

• D, A, B, C

• C, B, A, D

Which of the following best describes the role of water in the formation of sedimentary rocks?

• Water dissolves minerals, which then crystallize to form rocks.

• Water transports and deposits sediments, which are then compacted and cemented into rock.

• Water cools down magma to form rocks.

• Water causes the melting of existing rocks to form new ones.

Aubree wants to make a model to show how sedimentary rock is formed. The materials she has been listed. How should  Aubree create her model to best show the formation of sedimentary rock?

• Aubree should mix the gravel and sand in the clear plastic container with no water, add the dirt, and then pour out the water

• Aubree should layer the sand, gravel, and dirt in the clear plastic container with water, and then stir everything together

• Aubree should layer the sand, gravel, and dirt in the clear plastic container with water, and then press the layers together

• Aubree should mix the gravel and sand in the clear plastic container with no water, add the dirt, and then stir everything together

Part A 

Some students make a model to show one of the first steps in the formation of sedimentary rock. The students pour 2 centimeters of light-colored sand into a clear plastic box. Then they add 1 centimeter of gravel. Finally they pour 2 centimeters of dark-colored sand on top of the gravel. Which characteristic of sedimentary rock does this model best show?

• Sedimentary rock is made of layers.

• Sedimentary rock is often limestone

• Sedimentary rock is cemented bits of rock.

• Sedimentary rock is common in Texas.

Part B

Last year in 4th grade only 78% of students got this answer correct, What skill did you use to correctly answer the question focusing on sedimentary rock formation?

Here is the question.

Some students make a model to show one of the first steps in the formation of sedimentary rock. The students pour 2 centimeters of light-colored sand into a clear plastic box. Then they add 1 centimeter of gravel. Finally they pour 2 centimeters of dark-colored sand on top of the gravel. Which characteristic of sedimentary rock does this model best show?