ATI TEAS 7
Chemistry
1. What is the term for a solution that has a lower concentration of solute compared to another solution?
- A. Saturated solution
- B. Unsaturated solution
- C. Dilute solution
- D. Concentrated solution
Correct answer: C
Rationale: A dilute solution has a lower concentration of solute compared to another solution. The other choices do not accurately describe a dilute solution.
2. Which term describes the quantity of matter in an object and is measured in kilograms or grams?
- A. Weight
- B. Mass
- C. Volume
- D. Density
Correct answer: B
Rationale: Mass is the term that describes the quantity of matter in an object. It is typically measured in kilograms or grams. Weight, on the other hand, is the force of gravity acting on an object and is measured in newtons. Volume is the amount of space an object occupies, typically measured in cubic units such as cubic meters or cubic centimeters. Density is the mass of an object per unit volume and is measured in units such as kilograms per cubic meter.
3. A new drug successfully treats a disease in mice. This suggests the drug will also be effective in humans. True or False? False. Animal models don't always perfectly translate to humans due to biological differences. Further testing in humans is crucial before drawing conclusions about safety and efficacy. A conclusion based on scientific evidence should be:
- A. Unquestionable and accepted by all scientists.
- B. Open to revision and further testing as new evidence emerges.
- C. Based solely on expert opinions and authority figures.
- D. Always presented as absolute truth with no room for doubt.
Correct answer: B
Rationale: Scientific conclusions should always be open to revision and further testing as new evidence emerges. Science is a dynamic process that involves continuous questioning, testing, and refining of ideas based on the most current evidence available. It is essential to remain open-minded and willing to adjust conclusions in light of new information to ensure the most accurate and reliable understanding of the natural world.
4. "Ironic" and "serious" are:
- A. synonyms (have the same meaning)
- B. antonyms (have opposite meanings)
- C. homonyms (sound the same but have different meanings)
- D. none of the above
Correct answer: B
Rationale: "Ironic" means the opposite of "serious."
5. What is the best way to revise the sentence: "Her eyes glistened with tears in the moonlight"?
- A. Her eyes glistened in the moonlight, with tears.
- B. Tears glistened in her eyes with moonlight.
- C. Her eyes, in the moonlight, glistened with tears.
- D. Tears made her eyes glisten in the moonlight.
Correct answer: C
Rationale: Option C rearranges the elements for smoother flow and emphasis on the tears.
6. The process by which a single-celled organism divides into two identical daughter cells is called
- A. Conjugation
- B. Binary fission
- C. Endocytosis
- D. Mitosis
Correct answer: B
Rationale: Rationale: A) Conjugation is a process in which genetic material is transferred between two bacterial cells through a conjugation tube. It does not involve the division of a single-celled organism into two identical daughter cells. B) Binary fission is the process by which a single-celled organism, such as a bacterium, divides into two identical daughter cells. This is a common method of reproduction in prokaryotic organisms. C) Endocytosis is a cellular process in which cells engulf external materials by wrapping them in a vesicle. It is not a method of cell division. D) Mitosis is a type of cell division that occurs in eukaryotic cells, leading to the production of two daughter cells with identical genetic material. However, the question specifically refers to a single-celled organism, which typically undergoes binary fission for reproduction.
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