1. Which of the following is NOT a function of the endocrine system?

A. Regulating growth and development
B. Maintaining blood sugar levels
C. Controlling mood and emotions
D. Facilitating digestion through muscle contractions

Correct answer: D

Rationale: The endocrine system is responsible for producing hormones that regulate various bodily functions. Option D, facilitating digestion through muscle contractions, is actually a function of the muscular and digestive systems, not the endocrine system. The endocrine system primarily regulates growth and development, maintains blood sugar levels through hormones like insulin and glucagon, and also plays a role in controlling mood and emotions through hormones such as serotonin and cortisol. Therefore, option D is correct as it is not a function directly associated with the endocrine system.

2. Which of the following is an example of a weak acid?

A. Hydrochloric acid (HCl)
B. Sulfuric acid (H2SO4)
C. Acetic acid (CH3COOH)
D. Nitric acid (HNO3)

Correct answer: C

Rationale: Weak acids only partially dissociate in water, releasing a lower concentration of hydrogen ions.

3. What principle explains the relationship between pressure, volume, and temperature for ideal gases?

A. Law of conservation of energy
B. Newton's laws of motion
C. Ideal gas law
D. Archimedes' principle

Correct answer: C

Rationale: The ideal gas law (PV = nRT) relates pressure, volume, and temperature for ideal gases at constant number of moles and temperature.

4. Which term describes the resistance of a substance to being hammered into different shapes?

A. Viscosity
B. Ductility
C. Malleability
D. Conductivity

Correct answer: c

Rationale: Malleability refers to the resistance of a substance to being hammered or pressed into different shapes without breaking.

5. An element with atomic number 26 and mass number 56 is most likely to be:

A. Iron (Fe)
B. Cobalt (Co)
C. Nickel (Ni)
D. Manganese (Mn)

Correct answer: A

Rationale: Iron (Fe) - Fe-56 has 26 protons and aligns with the given atomic number and mass number.

6. Warming up before exercise is important to help prevent

A. Dehydration
B. Muscle soreness
C. Increased heart rate
D. Low blood sugar

Correct answer: B

Rationale: The correct answer is B: 'Muscle soreness.' Warming up before exercise is crucial as it helps increase blood flow to the muscles, warming them up and making them more flexible. This can help reduce the risk of muscle soreness and injury during and after exercise. Dehydration (A) is more related to maintaining proper fluid balance through hydration. Increased heart rate (C) is a normal response to exercise and can be beneficial. Low blood sugar (D) is more of a concern for individuals with conditions like diabetes. Therefore, the most immediate benefit of warming up is to prevent muscle soreness.