ATI TEAS 7
Chemistry
1. When sodium hydroxide (NaOH) reacts with hydrochloric acid (HCl), the resulting product is:
- A. Hydrogen gas and sodium chloride (NaCl)
- B. Chlorine gas and sodium oxide (Na2O)
- C. Sodium metal (Na) and water (H2O)
- D. No reaction occurs.
Correct answer: A
Rationale: This is a classic neutralization reaction, forming water and a salt (sodium chloride).
2. Which hormone is responsible for the characteristic changes experienced during puberty, such as breast development and menstruation in females?
- A. Follicle-stimulating hormone (FSH)
- B. Luteinizing hormone (LH)
- C. Estrogen
- D. Progesterone
Correct answer: C
Rationale: The correct answer is C: Estrogen. Estrogen plays a crucial role in regulating the development of secondary sexual characteristics during puberty in females. It is responsible for breast development, widening of hips, and the onset of menstruation. Estrogen is mainly produced by the ovaries and is essential for the maturation of the reproductive system. Follicle-stimulating hormone (FSH) and luteinizing hormone (LH) are pituitary hormones that regulate the menstrual cycle and ovulation but do not directly cause the characteristic changes seen during puberty. Progesterone is another hormone involved in the menstrual cycle and pregnancy but is not primarily responsible for the physical changes during puberty.
3. What is the difference between mass and weight?
- A. Mass is the force exerted on an object due to gravity, whereas weight is the amount of matter in an object.
- B. Mass is a measure of inertia, whereas weight is a measure of the force of gravity acting on an object.
- C. Mass is measured in pounds, whereas weight is measured in kilograms.
- D. Mass is a vector quantity, whereas weight is a scalar quantity.
Correct answer: b
Rationale: Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity.
4. Which of the following is NOT a risk factor for developing atherosclerosis?
- A. High blood pressure
- B. High levels of LDL cholesterol
- C. Regular physical activity
- D. Smoking
Correct answer: C
Rationale: Regular physical activity is NOT a risk factor for developing atherosclerosis. In fact, engaging in regular physical activity can help reduce the risk of developing atherosclerosis by improving cardiovascular health, lowering blood pressure, and reducing LDL cholesterol levels. High blood pressure, high levels of LDL cholesterol, and smoking are all known risk factors for atherosclerosis. High blood pressure can damage blood vessels, making them more susceptible to plaque buildup. High levels of LDL cholesterol can lead to the accumulation of plaque in the arteries, narrowing the passageways and increasing the risk of atherosclerosis. Smoking is harmful to blood vessels, promoting inflammation and the formation of plaque. Therefore, regular physical activity is actually a protective factor against atherosclerosis rather than a risk factor.
5. Which word is spelled correctly?
- A. Accomodate
- B. Acquiesce
- C. Percieve
- D. Dilema
Correct answer: B
Rationale: Option B is the correct spelling for "to submit or agree without protest."
6. Which type of reaction is represented by the equation A + B → AB?
- A. Synthesis
- B. Decomposition
- C. Single Replacement
- D. Double Replacement
Correct answer: a
Rationale: Synthesis reactions involve the combination of two or more substances to form a new compound.
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