CCS CCS Cremation Chemistry and Science 1 — Questions and Answers
Question 1: What is the primary chemical process that occurs during cremation of human remains?
- Hydrolysis
- Oxidation (combustion) (Correct answer)
- Reduction
- Fermentation
Correct answer: Oxidation (combustion)
Cremation is fundamentally an oxidation process in which organic compounds in soft tissue and bone react with oxygen at high temperatures.
Question 2: What is the main mineral component of cremated remains (cremains)?
- Calcium carbonate (CaCO₃)
- Calcium phosphate / hydroxyapatite [Ca₁₀(PO₄)₆(OH)₂] (Correct answer)
- Magnesium oxide (MgO)
- Sodium chloride (NaCl)
Correct answer: Calcium phosphate / hydroxyapatite [Ca₁₀(PO₄)₆(OH)₂]
Hydroxyapatite, a calcium phosphate mineral, is the primary structural mineral of bone and is what remains after cremation.
Question 3: Why do cremated remains appear white or grayish-white in color?
- Because ash from the combustion of soft tissue coats the bone fragments
- Because calcium oxide and calcium phosphate are naturally white compounds (Correct answer)
- Because the retort chamber walls leave a white residue on the remains
- Because the remains are treated with a whitening agent after processing
Correct answer: Because calcium oxide and calcium phosphate are naturally white compounds
The white or gray color of cremains results from the calcium oxide and calcium phosphate compounds that make up calcined bone.
Question 4: What gases are primarily released during the combustion of soft tissue in cremation?
- Nitrogen and hydrogen
- Carbon dioxide and water vapor (Correct answer)
- Sulfur dioxide and nitrogen oxide only
- Methane and carbon monoxide only
Correct answer: Carbon dioxide and water vapor
Combustion of organic tissue primarily produces carbon dioxide (CO₂) and water vapor (H₂O) as the main byproducts.
Question 5: What is the typical weight range of cremated remains from an average adult?
- 1–3 pounds (0.45–1.36 kg)
- 3–9 pounds (1.4–4.1 kg) (Correct answer)
- 10–15 pounds (4.5–6.8 kg)
- Less than 1 pound (under 0.45 kg)
Correct answer: 3–9 pounds (1.4–4.1 kg)
Adult cremated remains typically weigh between 3 and 9 pounds (approximately 1.4–4.1 kg), depending on body size and bone density.
Question 6: Why does the weight of cremated remains vary between individuals?
- Differences in the cremation temperature used for each individual
- Variations in skeletal size, bone density, and body mass (Correct answer)
- The type of container used during cremation affects final weight
- Older retort equipment produces heavier remains than newer models
Correct answer: Variations in skeletal size, bone density, and body mass
Skeletal size, bone density, and overall body mass are the primary factors that determine the weight of an individual's cremated remains.
CCS CCS Cremation Chemistry and Science 1
What is the primary chemical process that occurs during cremation of human remains?