ATI TEAS 7
Chemistry
1. The number of protons in an atom determines its:
- A. Mass number
- B. Atomic number
- C. Atomic number
- D. Valence electron count
Correct answer: B
Rationale: The atomic number (Z) equals the number of protons and defines an element's core identity.
2. Identify the verb in the following sentence: The dog chased the fluffy squirrel around the oak tree.
- A. around
- B. chased
- C. squirrel
- D. the
Correct answer: B
Rationale: Verbs express actions or states of being. In this sentence, "chased" describes what the dog did.
3. A set of temperature readings has a range of 5 degrees Celsius. What does this tell you about the data?
- A. The average temperature is 5 degrees Celsius.
- B. All temperatures are within 5 degrees of each other.
- C. The difference between the highest and lowest temperatures is 5 degrees.
- D. There are exactly 5 temperatures in the set.
Correct answer: C
Rationale: Rationale: - Option A is incorrect because the range of 5 degrees does not necessarily mean that the average temperature is 5 degrees Celsius. The average temperature could be any value within the range. - Option B is incorrect because the range of 5 degrees does not mean that all temperatures are within 5 degrees of each other. It only indicates the difference between the highest and lowest temperatures. - Option C is correct because the range of 5 degrees specifically refers to the difference between the highest and lowest temperatures in the set. This is a common definition of range in statistics. - Option D is incorrect because the range of 5 degrees does not determine the number of temperatures in the set. The set could have more or fewer than 5 temperatures.
4. What is the main function of energy storage technologies in the context of renewable energy?
- A. Reduce the cost of producing solar and wind power.
- B. Enhance the efficiency of energy transmission and distribution.
- C. Compensate for the intermittent nature of renewable energy sources.
- D. Eliminate the need for fossil fuels in electricity generation.
Correct answer: C
Rationale: Choice C directly addresses the passage's emphasis on managing the fluctuating availability of renewable energy, hence being the main function of storage technologies.
5. hich word is most closely associated with the adjective "meticulous"?
- A. careless
- B. precise
- C. indifferent
- D. enthusiastic
Correct answer: B
Rationale: "Meticulous" implies carefulness and attention to detail, making "precise" its closest synonym.
6. Which type of waves do not require a medium for propagation?
- A. Transverse waves
- B. Longitudinal waves
- C. Electromagnetic waves
- D. Surface waves
Correct answer: c
Rationale: Electromagnetic waves (such as light or radio waves) can travel through a vacuum as they do not require a medium.
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