Question

limestone, a sedimentary rock, is made of mostly ____ which is the mineral found in bones.
○ cerium
○ osteocyte
○ calcite
○ fluoride

1. choose the correct answer.

where are many rock salt columns found?
○ in rivers
○ in the dead sea
○ in freshwater lakes
○ in the mountains

1. choose five uses for sedimentary rock.

□ seasoning food
□ melting ice from sidewalks
□ preserving meats
□ building material
□ mirrors
□ sculpting
□ cleaning material

Explanation:

Question 1:

Cerium is a rare - earth metal, not related to limestone or bone minerals. Osteocyte is a bone cell, not a mineral. Fluoride is a compound ion, not the main mineral in limestone or bones. Calcite (a form of calcium carbonate) is the main mineral in limestone, and calcium - based minerals are also found in bones.

Rock salt (halite) columns are associated with salt - rich environments. The Dead Sea is a very salty body of water, and rock salt formations are common there. Rivers and freshwater lakes have low salt content, and mountains are not typical environments for rock salt columns.

• Seasoning food: Rock salt (a sedimentary rock) is used to season food.
• Melting ice from sidewalks: Rock salt can lower the freezing point of water, so it's used for de - icing.
• Preserving meats: Salt (from sedimentary rock) is used in meat preservation.
• Building material: Sedimentary rocks like limestone can be used as building materials.
• Sculpting: Some sedimentary rocks, like limestone or sandstone, are used for sculpting.

Melting ice from sidewalks is also a use (rock salt), and cleaning material is not a typical use of sedimentary rock, mirrors are not made from sedimentary rock.

Answer:

calcite

Question 2: