ATI TEAS 7
Chemistry
1. What is the term for a solution with a pH value less than 7?
- A. Acidic
- B. Neutral
- C. Alkaline
- D. Basic
Correct answer: a
Rationale: Solutions with a pH less than 7 are acidic. The other choices do not accurately describe solutions with a pH less than 7.
2. What is the functional group present in esters?
- A. Hydroxyl
- B. Carbonyl
- C. Ester
- D. Amine
Correct answer: C
Rationale: Esters have the functional group -COO-, representing a carbonyl group bonded to an oxygen atom. The other choices are associated with different functional groups.
3. A closed system in ecology is one that:
- A. Exchanges energy but not matter
- B. Exchanges both energy and matter
- C. Exchanges neither energy nor matter
- D. Recycles nutrients efficiently
Correct answer: A
Rationale: Rationale: In ecology, a closed system is one that does not exchange matter with its surroundings but can exchange energy. This means that while energy can enter or leave the system, the amount of matter within the system remains constant. This definition aligns with option A, making it the correct answer. Options B and C are incorrect because a closed system does not exchange matter, and option D is not directly related to the definition of a closed system in ecology.
4. Which of the following is a property of amphiprotic substances?
- A. React with acids only
- B. React with bases only
- C. Can act as both acids and bases
- D. Are inert in chemical reactions
Correct answer: C
Rationale: Amphiprotic substances can donate or accept a proton, so they can act as both acids and bases. The other choices do not accurately describe amphiprotic substances.
5. Identify the appositive in the following sentence: "My favorite author, Agatha Christie, wrote many detective novels."
- A. favorite
- B. Agatha Christie
- C. many
- D. novels
Correct answer: B
Rationale: An appositive renames or clarifies the noun or pronoun preceding it.
6. The outermost layer of the skin, providing protection against pathogens and the environment, is the:
- A. Dermis
- B. Epidermis
- C. Hypodermis
- D. Stratum corneum (part of the epidermis)
Correct answer: D
Rationale: The correct answer is D, 'Stratum corneum (part of the epidermis).' The stratum corneum is the outermost layer of the epidermis, consisting of dead skin cells that provide a protective barrier against pathogens and environmental factors. The dermis is located beneath the epidermis and contains connective tissue, nerves, and blood vessels. The hypodermis is the deepest layer of the skin, consisting of fat and connective tissue. Understanding the layers of the skin and their functions is essential for comprehending the skin's role in protecting the body.
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