Page 1 of 177
CIDESCO EXAM PREP 2026/2027
250+ PRACTICE QUESTIONS & VERIFIED
ANSWERS WITH RATIONALES
100% ALIGNED WITH LATEST CURRICULUM
GUIDELINES | GRADED A+
# TABLE OF CONTENTS
| Section | Topic Area | Questions |
|---------|------------|-----------|
| **Section 1** | Natural Sciences – Chemistry & Physics | Q1–Q45 |
| **Section 2** | Anatomy & Physiology – Cells, Tissues & Skeletal System | Q46–Q85 |
| **Section 3** | Anatomy & Physiology – Muscular, Nervous & Circulatory Systems | Q86–Q120 |
| **Section 4** | Anatomy & Physiology – Digestive, Respiratory & Other Systems | Q121–Q145 |
| **Section 5** | Skin Science & Dermatology | Q146–Q185 |
| **Section 6** | Cosmetic Science & Product Ingredients | Q186–Q210 |
| **Section 7** | Facial Treatments & Skin Analysis | Q211–Q240 |
| **Section 8** | Electrotherapy & Electrical Treatments | Q241–Q265 |
| **Section 9** | Body Treatments & Massage | Q266–Q285 |
| **Section 10** | Hygiene, Sanitation & Infection Control | Q286–Q305 |
| **Section 11** | Professional Practice, Business & Client Care | Q306–Q330 |
| **Section 12** | Nutrition, Hair Removal & Additional Topics | Q331–Q350 |
,Page 2 of 177
# SECTION 1: NATURAL SCIENCES – CHEMISTRY & PHYSICS
**Q1. Matter is defined as everything that:**
- A) Has weight and occupies space
- B) Can be seen with the naked eye
- C) Exists only in solid form
- D) Contains carbon atoms
**Correct Answer: A**
**Rationale:** Matter is defined as any substance that has mass (weight) and occupies space
(volume). This fundamental definition applies to all forms of matter—solids, liquids, and
gases—regardless of whether they are visible or contain carbon. Option B is incorrect because
many forms of matter (e.g., gases, microscopic particles) cannot be seen with the naked eye.
Option C is incorrect because matter exists in three states: solid, liquid, and gas. Option D is
incorrect because not all matter contains carbon (e.g., water, minerals).
---
**Q2. Which property does ALL matter possess?**
- A) Color
- B) Weight
- C) Odor
- D) Electrical conductivity
**Correct Answer: B**
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**Rationale:** All matter has weight (mass) as a fundamental property. Color, odor, and
electrical conductivity are not universal properties of all matter—many substances are colorless,
odorless, or non-conductive.
---
**Q3. The three forms of matter are solids, liquids, and:**
- A) Plasmas
- B) Vapors
- C) Gases
- D) Crystals
**Correct Answer: C**
**Rationale:** The three classical states of matter are solid, liquid, and gas. While plasma is
sometimes considered a fourth state, the CIDESCO curriculum recognizes the three fundamental
states. Vapors are a gaseous state, and crystals are a solid form.
---
**Q4. Sublimation is the change of matter from:**
- A) A liquid to a gas
- B) A solid to a liquid
- C) A solid to a gas
- D) A gas to a liquid
**Correct Answer: C**
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**Rationale:** Sublimation is the process by which a substance changes directly from a solid to
a gas without passing through the liquid state. An example is dry ice (solid carbon dioxide)
turning into carbon dioxide gas. Option A describes evaporation/vaporization, Option B
describes melting, and Option D describes condensation.
---
**Q5. The alteration of the properties of matter without the formation of any new substance is
called a/an:**
- A) Chemical change
- B) Physical change
- C) Nuclear change
- D) Biological change
**Correct Answer: B**
**Rationale:** A physical change alters the properties of matter (such as shape, size, or state)
without forming any new substance. Examples include melting ice, dissolving sugar in water, or
cutting paper. Chemical changes (Option A) result in the formation of new substances with
different properties.
---
**Q6. The immediate change of a solid into a vapour is called:**
- A) Evaporation
- B) Condensation
- C) Sublimation
- D) Distillation
CIDESCO EXAM PREP 2026/2027
250+ PRACTICE QUESTIONS & VERIFIED
ANSWERS WITH RATIONALES
100% ALIGNED WITH LATEST CURRICULUM
GUIDELINES | GRADED A+
# TABLE OF CONTENTS
| Section | Topic Area | Questions |
|---------|------------|-----------|
| **Section 1** | Natural Sciences – Chemistry & Physics | Q1–Q45 |
| **Section 2** | Anatomy & Physiology – Cells, Tissues & Skeletal System | Q46–Q85 |
| **Section 3** | Anatomy & Physiology – Muscular, Nervous & Circulatory Systems | Q86–Q120 |
| **Section 4** | Anatomy & Physiology – Digestive, Respiratory & Other Systems | Q121–Q145 |
| **Section 5** | Skin Science & Dermatology | Q146–Q185 |
| **Section 6** | Cosmetic Science & Product Ingredients | Q186–Q210 |
| **Section 7** | Facial Treatments & Skin Analysis | Q211–Q240 |
| **Section 8** | Electrotherapy & Electrical Treatments | Q241–Q265 |
| **Section 9** | Body Treatments & Massage | Q266–Q285 |
| **Section 10** | Hygiene, Sanitation & Infection Control | Q286–Q305 |
| **Section 11** | Professional Practice, Business & Client Care | Q306–Q330 |
| **Section 12** | Nutrition, Hair Removal & Additional Topics | Q331–Q350 |
,Page 2 of 177
# SECTION 1: NATURAL SCIENCES – CHEMISTRY & PHYSICS
**Q1. Matter is defined as everything that:**
- A) Has weight and occupies space
- B) Can be seen with the naked eye
- C) Exists only in solid form
- D) Contains carbon atoms
**Correct Answer: A**
**Rationale:** Matter is defined as any substance that has mass (weight) and occupies space
(volume). This fundamental definition applies to all forms of matter—solids, liquids, and
gases—regardless of whether they are visible or contain carbon. Option B is incorrect because
many forms of matter (e.g., gases, microscopic particles) cannot be seen with the naked eye.
Option C is incorrect because matter exists in three states: solid, liquid, and gas. Option D is
incorrect because not all matter contains carbon (e.g., water, minerals).
---
**Q2. Which property does ALL matter possess?**
- A) Color
- B) Weight
- C) Odor
- D) Electrical conductivity
**Correct Answer: B**
,Page 3 of 177
**Rationale:** All matter has weight (mass) as a fundamental property. Color, odor, and
electrical conductivity are not universal properties of all matter—many substances are colorless,
odorless, or non-conductive.
---
**Q3. The three forms of matter are solids, liquids, and:**
- A) Plasmas
- B) Vapors
- C) Gases
- D) Crystals
**Correct Answer: C**
**Rationale:** The three classical states of matter are solid, liquid, and gas. While plasma is
sometimes considered a fourth state, the CIDESCO curriculum recognizes the three fundamental
states. Vapors are a gaseous state, and crystals are a solid form.
---
**Q4. Sublimation is the change of matter from:**
- A) A liquid to a gas
- B) A solid to a liquid
- C) A solid to a gas
- D) A gas to a liquid
**Correct Answer: C**
, Page 4 of 177
**Rationale:** Sublimation is the process by which a substance changes directly from a solid to
a gas without passing through the liquid state. An example is dry ice (solid carbon dioxide)
turning into carbon dioxide gas. Option A describes evaporation/vaporization, Option B
describes melting, and Option D describes condensation.
---
**Q5. The alteration of the properties of matter without the formation of any new substance is
called a/an:**
- A) Chemical change
- B) Physical change
- C) Nuclear change
- D) Biological change
**Correct Answer: B**
**Rationale:** A physical change alters the properties of matter (such as shape, size, or state)
without forming any new substance. Examples include melting ice, dissolving sugar in water, or
cutting paper. Chemical changes (Option A) result in the formation of new substances with
different properties.
---
**Q6. The immediate change of a solid into a vapour is called:**
- A) Evaporation
- B) Condensation
- C) Sublimation
- D) Distillation
