ATI TEAS 7
Chemistry
1. What is the name for the tiny particles that make up atoms?
- A. Protons
- B. Electrons
- C. Neutrons
- D. Subatomic particles
Correct answer: D
Rationale: Protons, neutrons, and electrons are all subatomic particles that make up atoms.
2. The professor explained the concept clearly. What is the past participle of the verb "explain"?
- A. explains
- B. explaining
- C. explained
- D. explanation
Correct answer: C
Rationale: The past participle is used to form verb tenses and passive voice constructions.
3. How do isotopes affect the atomic mass of an element?
- A. Isotopes have no effect on the atomic mass of an element.
- B. Isotopes cause the atomic mass of an element to vary slightly.
- C. Isotopes cause the atomic mass of an element to be exactly the same for all isotopes of that element.
- D. Isotopes cause the atomic mass of an element to vary greatly.
Correct answer: B
Rationale: The atomic mass of an element is the average mass of all the isotopes of that element. Since isotopes have different numbers of neutrons, they also have slightly different masses. This variation in mass is what causes the atomic mass of an element to be a decimal number, rather than a whole number.
4. A medication must be taken twice daily, 12 hours apart. If the first dose is at 8:00 AM, what is the most convenient time for the second dose to avoid disrupting sleep?
- A. 4:00 PM
- B. 6:00 PM
- C. 8:00 PM
- D. 10:00 PM
Correct answer: B
Rationale: Rationale: To take the medication 12 hours apart from the first dose at 8:00 AM, the second dose should be taken at 8:00 PM. However, to avoid disrupting sleep, it is recommended to take the second dose a bit earlier. Taking the second dose at 6:00 PM ensures that the medication is still being taken 12 hours apart while allowing for a buffer before bedtime to avoid any potential disruptions to sleep.
5. Which sentence uses parallel structure correctly?
- A. I enjoy reading, watching movies, and to spend time with friends.
- B. Reading, watching movies, and spending time with friends are all activities I enjoy.
- C. like to read, watch movies, and spend time with friends.
- D. Reading, movies, and friends are all things I enjoy.
Correct answer: B
Rationale: Parallel structure means using the same grammatical form for elements in a list. Option (b) uses parallel gerunds ("reading," "watching," "spending"), making it the correct choice.
6. What term describes the maximum displacement of particles from their rest position in a wave?
- A. Frequency
- B. Wavelength
- C. Amplitude
- D. Velocity
Correct answer: C
Rationale: The term that describes the maximum displacement of particles from their rest position in a wave is called the amplitude. Amplitude is a measure of the strength or intensity of a wave and is represented by the height of the wave from the rest position to the crest (or trough) of the wave. Frequency (A) refers to the number of complete wavelengths that pass a point in a given time, wavelength (B) is the distance between two consecutive crests (or troughs) of a wave, and velocity (D) is the speed of the wave.
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