ATI TEAS 7
Chemistry
1. What is the law that states energy can neither be created nor destroyed?
- A. Law of Conservation of Matter
- B. Law of Conservation of Energy
- C. Law of Universal Gravitation
- D. Law of Inertia
Correct answer: B
Rationale: Law of Conservation of Energy. This law applies to both chemical and physical processes, including chemical reactions.
2. A medication order is for 250 micrograms of a drug to be administered subcutaneously. The available syringe measures in milliliters. How many milliliters should the nurse draw up?
- A. 0.00025 milliliters
- B. 0.0025 milliliters
- C. 0.025 milliliters
- D. 0.25 milliliters
Correct answer: B
Rationale: First convert micrograms to milliliters, knowing 1000 micrograms equal 1 milliliter. Divide the desired dosage (250 micrograms) by the conversion factor (1000 micrograms/milliliter) to find the volume needed: 250 micrograms / 1000 micrograms/milliliter = 0.00025 milliliters. However, drawing such a small volume might be inaccurate, so round to the nearest practical measurement, which is 0.0025 milliliters.
3. What does the term "terminal velocity" refer to in physics?
- A. Maximum velocity reached by an object in free fall
- B. Velocity when the object is at rest
- C. nstantaneous velocity of an object
- D. Velocity only reached by heavy objects
Correct answer: a
Rationale: Terminal velocity is the constant velocity achieved by an object falling through the atmosphere when the force of air resistance equals the force of gravity.
4. Which of the following is the main organ responsible for filtering urine?
- A. Kidneys
- B. Bladder
- C. Ureters
- D. Urethra
Correct answer: A
Rationale: Rationale: The kidneys are the main organs responsible for filtering urine. They play a crucial role in the urinary system by filtering waste products and excess substances from the blood to produce urine. The urine then travels from the kidneys to the bladder through the ureters, where it is stored until it is expelled from the body through the urethra. The bladder stores urine temporarily, while the ureters are tubes that transport urine from the kidneys to the bladder. The urethra is the tube through which urine is expelled from the body.
5. When light reflects from a surface, what determines the angle of reflection?
- A. The material of the surface
- B. The wavelength of the light
- C. The angle of incidence
- D. The intensity of the light
Correct answer: C
Rationale: The angle of reflection is always equal to the angle of incidence according to the law of reflection, regardless of the material, wavelength, or intensity.
6. What term describes the point where parallel rays of light converge or appear to diverge from after passing through a lens or reflecting off a mirror?
- A. Aperture
- B. Focal length
- C. Refractive index
- D. Lens thickness
Correct answer: B
Rationale: The focal length is the term that describes the point where parallel rays of light converge or appear to diverge from after passing through a lens or reflecting off a mirror. It is a crucial parameter in optics and is used to determine the magnification and image formation in optical systems. The other options (A) Aperture, (C) Refractive index, and (D) Lens thickness are not directly related to the point where parallel rays of light converge or appear to diverge.
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