ATI TEAS 7
Chemistry
1. Which element is used in semiconductors like computer chips and solar panels?
- A. Germanium
- B. Silicon
- C. Gallium
- D. Arsenic
Correct answer: B
Rationale: Silicon's unique properties allow it to be manipulated to conduct or not conduct electricity, making it ideal for various electronic applications.
2. What is the unit of measurement for force in the International System of Units (SI)?
- A. Newton (N)
- B. Kilogram (kg)
- C. Joule (J)
- D. Meter per second squared (m/s²)
Correct answer: a
Rationale: Force is measured in Newtons (N) in the SI system.
3. Dietary fiber, although not fully digested by the body, plays a crucial role in digestion. What is one of the main benefits of consuming sufficient dietary fiber?
- A. Provides a concentrated source of energy
- B. Aids in the absorption of vitamins and minerals
- C. Promotes satiety and gut health
- D. Breaks down complex carbohydrates
Correct answer: C
Rationale: Consuming sufficient dietary fiber promotes satiety and gut health. Fiber adds bulk to the diet, which helps you feel full and satisfied after meals, reducing overeating. Additionally, fiber helps regulate bowel movements by promoting healthy digestion and preventing constipation. It also feeds beneficial gut bacteria, supporting a healthy gut microbiome. While fiber does not provide energy like carbohydrates, it is essential for overall digestive health and can help prevent various chronic diseases.
4. Which element has the highest melting point of any element?
- A. Tungsten
- B. Iron
- C. Platinum
- D. Carbon
Correct answer: D
Rationale: Diamond's strong covalent bonds between carbon atoms make it incredibly resistant to heat and pressure, giving it the highest melting point.
5. Which property of a substance measures the amount of matter per unit volume?
- A. Density
- B. Mass
- C. Weight
- D. Volume
Correct answer: a
Rationale: Density is the property that measures the amount of matter (mass) per unit volume of a substance. It is calculated as mass divided by volume.
6. Bile, a digestive juice, is produced by which organ?
- A. Stomach
- B. Liver
- C. Pancreas
- D. Small intestine
Correct answer: B
Rationale: The correct answer is B: Liver. Bile is a digestive juice that is produced by the liver and stored in the gallbladder. It plays a crucial role in the digestion and absorption of fats in the small intestine. The stomach primarily produces gastric juices that aid in breaking down food, while the pancreas secretes digestive enzymes and bicarbonate into the small intestine. The small intestine is responsible for the absorption of nutrients. Therefore, the liver is the organ that produces bile, making it the correct answer to this question.
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