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Why is water sometimes called the "universal solvent"?.

A. Because water dissolves all solutes equally well.

B. Because water is a nonpolar solvent.

C. Because water is good at dissolving ions and polar molecules.

D. Because water is poor at dissolving nonpolar molecules.

Answer Explanation:

Water is sometimes called the “universal solvent” because it dissolves more substances than any other liquid.

This is due to its polarity and ability to form hydrogen bonds, which allows it to dissolve ions and polar molecules.

Choice A) Because water dissolves all solutes equally well is incorrect because water does not dissolve all solutes equally well.

Choice B) Because water is a nonpolar solvent is incorrect because water is a polar solvent.

Choice D) Because water is poor at dissolving nonpolar molecules is incorrect because it does not explain why water is called the “universal solvent”.

Therefore, the Correct Answer is C.

More Questions on TEAS 7 Science

  • Q #1: What is the largest vein in the human body that returns deoxygenated blood from the upper half of the body to the right atrium of the heart?

    A. Superior vena cava.

    B. Inferior vena cava.

    C. Pulmonary vein.

    D. Renal vein.

    Answer Explanation

    The correct answer is choice A.

    The superior vena cava is the largest vein in the human body that returns deoxygenated blood from the upper half of the body to the right atrium of the heart.

    Superior & Inferior Vena Cava Function & Location | What Blood Vessels Return  Blood to the Heart? - Video & Lesson Transcript | Study.com

    Choice B is incorrect because the inferior vena cava returns deoxygenated blood from the lower half of the body to the right atrium of the heart.

    Choice C is incorrect because the pulmonary vein carries oxygenated blood from the lungs to the left atrium of the heart.

    Choice D is incorrect because the renal vein carries deoxygenated blood from the kidneys to the inferior vena cava.

  • Q #2: How do neurons communicate with each other?

    A. Through electrical signals only

    B. Through chemical signals only

    C. Through electrical and chemical signals

    D. Through mechanical signals only.

    Answer Explanation

    Neurons communicate with each other through both electrical and chemical signals.

    The electrical signal, or action potential, runs from the cell body area to the axon terminals, through a thin fiber called axon.

    Neurons: How the Brain Communicates | Mental Health America

    Neurons also communicate with one another at junctions called synapses.

    At a synapse, one neuron sends a message to a target neuron—another cell.

    Most synapses are chemical; these synapses communicate using chemical messengers.

    Choice A is incorrect because neurons communicate not only through electrical signals but also through chemical signals.

    Choice B is incorrect because neurons communicate not only through chemical signals but also through electrical signals.

    Choice D is incorrect because neurons do not communicate through mechanical signals.

  • Q #3: In which type of tissue would you find a fibrous protein that provides strength and protection to the body, particularly in the skin, hair, and nails?

    A. Keratin

    B. Collagen

    C. Elastin

    D. Actin

    Answer Explanation

    The correct answer is choice A. Keratin.

    Keratin is a fibrous protein that provides strength and protection to the body, particularly in the skin, hair, and nails.

     
      Keratin Overview, Structure & Function | What is Keratin? - Video & Lesson  Transcript | Study.com

     

     

     

    It is found in epithelial tissue, which covers the body’s surface and lines its internal organs and cavities.

    Choice B.

     

    Collagen is incorrect because collagen is a fibrous protein that provides strength and support to connective tissues such as tendons, ligaments, and cartilage.

    Choice C.

    Elastin is incorrect because elastin is a protein that provides elasticity to tissues such as skin and blood vessels.

    Choice D.

    Actin is incorrect because actin is a protein that plays a role in muscle contraction and cell movement.