ATI TEAS 7
Chemistry
1. Which of the following is an example of a salt?
- A. Sodium hydroxide (NaOH)
- B. Hydrochloric acid (HCl)
- C. Sodium chloride (NaCl)
- D. Sulfuric acid (Hâ‚‚SOâ‚„)
Correct answer: c
Rationale: Sodium chloride is an example of a salt. The other choices are either bases or acids.
2. What is the meaning of the idiom "to cross that bridge when we come to it"?
- A. To deal with a problem immediately
- B. To plan for the future in detail
- C. To worry about potential problems prematurely
- D. To avoid difficult situations
Correct answer: C
Rationale: The idiom suggests dealing with challenges as they arise, not before.
3. Which phrase best describes the relationship between smart grid technologies and renewable energy integration?
- A. Competitive and incompatible, hindering each other's effectiveness.
- B. Neutral and independent, neither impacting nor relying on each other.
- C. Complementary and synergistic, enhancing each other's functionality.
- D. Substitutable and interchangeable, offering equivalent solutions.
Correct answer: C
Rationale: The passage highlights the mutually beneficial relationship between smart grids and renewables, with both working together to optimize integration.
4. A keystone species plays a critical role in an ecosystem because its removal would:
- A. Lead to a decrease in competition among other species
- B. Cause a slight increase in primary productivity
- C. Have a minimal impact on the overall ecosystem structure
- D. Disrupt the food web and cause cascading effects on other populations
Correct answer: D
Rationale: Rationale: Keystone species are species that have a disproportionately large effect on their environment relative to their abundance. They play a critical role in maintaining the structure and function of an ecosystem. If a keystone species is removed from an ecosystem, it can disrupt the food web by causing imbalances in predator-prey relationships. This disruption can lead to cascading effects on other populations within the ecosystem, potentially causing population declines or even extinctions. Therefore, the removal of a keystone species would have significant impacts on the overall ecosystem structure, making option D the correct answer.
5. What part of speech is the underlined word in the sentence: "He felt a growing sense of unease"?
- A. Verb
- B. Noun
- C. Adjective
- D. Adverb
Correct answer: B
Rationale: "Sense" represents a concept or feeling, making it a noun here.
6. What happens to the density of a gas when its temperature increases at constant pressure?
- A. It increases.
- B. It decreases.
- C. It remains the same.
- D. Information insufficient
Correct answer: B
Rationale: As gas particles gain thermal energy with increasing temperature, they spread out, decreasing the density.
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