TEAS version 7 quizlet science

TEAS version 7 quizlet science Related

Review TEAS version 7 quizlet science related questions and content

What phenomenon explains the formation of rainbows in the sky?

  • A. Diffraction
  • B. Interference
  • C. Refraction and dispersion of sunlight by water droplets
  • D. Reflection from clouds
Correct Answer: C

Rationale: Rainbows are formed due to the refraction and dispersion of sunlight by water droplets in the atmosphere. When sunlight enters a water droplet, it is refracted, then internally reflected, and finally refracted again as it exits the droplet. This dispersion of light into its component colors creates the beautiful rainbow we see in the sky. Choice A, diffraction, involves bending of light around obstacles or through narrow openings, not the splitting of light into colors as seen in rainbows. Choice B, interference, refers to the phenomenon where two or more light waves overlap and interact, producing a pattern of light and dark bands, which is not the case with rainbows. Choice D, reflection from clouds, does not accurately describe the process involved in the formation of rainbows through refraction and dispersion of light by water droplets.

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Which element is used in semiconductors like computer chips and solar panels?

  • A. Germanium
  • B. Silicon
  • C. Gallium
  • D. Arsenic
Correct Answer: B

Rationale: Silicon is the correct answer. Silicon is widely used in semiconductors for electronic applications because of its unique properties that allow it to be manipulated to conduct or not conduct electricity effectively. Germanium is also used in semiconductors but to a lesser extent compared to silicon. Gallium and arsenic are not as commonly used in semiconductors like computer chips and solar panels, making them incorrect choices for this question.

Which of the following is NOT a function of the integumentary system?

  • A. Regulation of body temperature
  • B. Protection from pathogens
  • C. Synthesis of vitamin D
  • D. Production of digestive enzymes
Correct Answer: D

Rationale: The correct answer is D. The production of digestive enzymes is not a function of the integumentary system. The integumentary system is responsible for regulating body temperature, protecting the body from pathogens, and synthesizing vitamin D. Digestive enzymes are produced by organs in the digestive system, such as the pancreas and stomach, and not by the integumentary system.

What is the primary function of B cells in the immune system?

  • A. Directly attacking and engulfing pathogens
  • B. Producing antibodies specific to a pathogen
  • C. Destroying infected body cells
  • D. All of the above
Correct Answer: B

Rationale: B cells are a type of white blood cell that primarily functions by producing antibodies specific to a pathogen. These antibodies play a crucial role in marking pathogens for destruction by other immune cells. While B cells are essential for the immune response, they do not directly attack and engulf pathogens or destroy infected body cells. These functions are carried out by other immune cells like macrophages and cytotoxic T cells. Therefore, the correct answer is B, as it accurately reflects the primary role of B cells in the immune system.

What is the term for a solution that has a higher concentration of solute compared to another solution?

  • A. Saturated solution
  • B. Unsaturated solution
  • C. Dilute solution
  • D. Concentrated solution
Correct Answer: D

Rationale: The correct answer is D, a concentrated solution. A concentrated solution contains a higher concentration of solute compared to another solution. This means there is a large amount of solute dissolved in the solvent, making it more concentrated than other solutions. Choices A, B, and C are incorrect. A saturated solution is one in which no more solute can be dissolved at a given temperature, an unsaturated solution can dissolve more solute at the given conditions, and a dilute solution has a low concentration of solute relative to the solvent.

Testosterone is a crucial hormone in the male reproductive system. What is its primary function?

  • A. Egg production
  • B. Sperm production and development
  • C. Regulation of the menstrual cycle
  • D. Milk production
Correct Answer: B

Rationale: Testosterone is a hormone primarily produced in the testes of males and is responsible for the development of male reproductive tissues, including the testes and prostate. Its primary function is the production and maturation of sperm cells, as well as the development of secondary sexual characteristics in males. Choice A, 'Egg production,' is incorrect as testosterone is not involved in the production of eggs. Choice C, 'Regulation of the menstrual cycle,' is incorrect because testosterone is not responsible for regulating the menstrual cycle, which is primarily governed by female hormones. Choice D, 'Milk production,' is incorrect as testosterone does not play a role in milk production, which is associated with other hormones like prolactin in females.

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