Physics and Biology Quiz: Waves and Eye Anatomy
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Questions and Answers

What is the unit of measurement for frequency?

  • Meters
  • Hertz (correct)
  • Meters per second
  • Seconds
  • The distance between two consecutive crests of a wave is called the amplitude.

    False (B)

    What is the formula for calculating the velocity of a wave?

    Velocity = frequency × wavelength

    The ______ of a wave is the measure of its maximum displacement from its rest position.

    <p>amplitude</p> Signup and view all the answers

    Match the following wave characteristics with their corresponding definitions:

    <p>Frequency = The speed at which a wave travels Wavelength = The distance between two consecutive crests or troughs Amplitude = The number of waves passing a point per unit time Velocity = The maximum displacement of a wave from its rest position</p> Signup and view all the answers

    What is the primary function of the lens in the eye?

    <p>To adjust the shape for focusing at different distances (B)</p> Signup and view all the answers

    The iris is responsible for focusing light onto the retina.

    <p>False (B)</p> Signup and view all the answers

    What is myopia?

    <p>Nearsightedness</p> Signup and view all the answers

    The ______ part of the eye adjusts pupil size based on light levels.

    <p>iris</p> Signup and view all the answers

    Match the eye diseases with their characteristics:

    <p>Myopia = Difficulty focusing on far objects Hyperopia = Difficulty focusing on near objects Astigmatism = Vision distortion due to irregular cornea Color blindness = Difficulty distinguishing certain colors</p> Signup and view all the answers

    What does the law of reflection state?

    <p>Light reflects off a surface at the same angle as it hits. (D)</p> Signup and view all the answers

    In a diverging (concave) lens, light rays converge toward a focal point.

    <p>False (B)</p> Signup and view all the answers

    What is the purpose of a pinhole camera?

    <p>To project an image onto a surface using a small hole.</p> Signup and view all the answers

    The angle of incidence equals the angle of __________.

    <p>refraction</p> Signup and view all the answers

    Match the following types of lenses with their characteristics:

    <p>Converging (Convex) = Thickest in the center and bends light rays toward a focal point Diverging (Concave) = Thin in the center and bends light rays outward</p> Signup and view all the answers

    What is the primary function of the stomach in the digestive system?

    <p>Mix food with hydrochloric acid (B)</p> Signup and view all the answers

    The small intestine is responsible for the majority of nutrient absorption in the digestive system.

    <p>True (A)</p> Signup and view all the answers

    What component is responsible for providing structure and protection in plant cells?

    <p>Cell Wall (A)</p> Signup and view all the answers

    What are the main macronutrients broken down in the stomach?

    <p>Carbohydrates and proteins</p> Signup and view all the answers

    The process of moving particles from a higher density region to a lower density region is called __________.

    <p>diffusion</p> Signup and view all the answers

    Animal cells have a cell wall.

    <p>False (B)</p> Signup and view all the answers

    Match the following macronutrients with their primary functions:

    <p>Carbohydrates = Energy production Proteins = Regulating chemical reactions Fats = Energy storage Vitamins = Supporting immune function</p> Signup and view all the answers

    What is the primary function of the nucleus in plant cells?

    <p>To contain hereditary material (DNA) and send signals for growth and division.</p> Signup and view all the answers

    In cellular respiration, ______ breaks down glucose to produce energy.

    <p>oxygen</p> Signup and view all the answers

    Match the following cell components with their functions:

    <p>Cell Wall = Provides shape and protection Cytoplasm = Site of chemical reactions Mitochondria = Produces energy (ATP) Nucleus = Contains genetic material</p> Signup and view all the answers

    Which vitamin is essential for healthy bones and teeth?

    <p>Vitamin D (A)</p> Signup and view all the answers

    Starch is a monosaccharide formed by joining glucose molecules.

    <p>False (B)</p> Signup and view all the answers

    What is the equation that represents photosynthesis?

    <p>6CO2 + 6H2O → C6H12O6 + 6O2</p> Signup and view all the answers

    The reagent used in the glucose test is __________.

    <p>Benedict's solution</p> Signup and view all the answers

    Match the following minerals with their primary functions:

    <p>Calcium = Necessary for healthy bones and teeth Iron = Needed for making red blood cells Phosphorus = Important for DNA synthesis Iodine = Component of thyroid hormones</p> Signup and view all the answers

    What is the role of the Krebs Cycle in respiration?

    <p>It breaks down pyruvate (D)</p> Signup and view all the answers

    Fermentation occurs when oxygen is available in the cells.

    <p>False (B)</p> Signup and view all the answers

    What is the main energy currency of the cell?

    <p>ATP</p> Signup and view all the answers

    Glucose is broken down during the process of __________.

    <p>glycolysis</p> Signup and view all the answers

    Match the following processes with their corresponding functions:

    <p>Glycolysis = Splitting glucose in half Electron Transport Chain = Creating water and ATP Krebs Cycle = Breaking down pyruvate Pyruvate = Precursor for fermentation or Krebs cycle</p> Signup and view all the answers

    Which statement correctly describes longitudinal waves?

    <p>They act along the same line of wave propagation. (A)</p> Signup and view all the answers

    Sound waves can travel through a vacuum.

    <p>False (B)</p> Signup and view all the answers

    What do the eardrum and three small bones in the middle ear do?

    <p>They transfer and amplify vibrations to cochlear nerves.</p> Signup and view all the answers

    The speed of sound in water is approximately _____ ms⁻¹.

    <p>1500</p> Signup and view all the answers

    Match the following wavelengths with the corresponding colors of visible light:

    <p>400nm = Violet light 450nm = Blue light 600nm = Yellow light 700nm = Red light</p> Signup and view all the answers

    Flashcards

    Frequency

    Number of vibrations per unit time, measured in Hertz (Hz).

    Wavelength

    Distance between two consecutive points of a wave, measured in meters (m).

    Velocity

    Wave speed; how fast the wave travels from one point to another, measured in m/s.

    Amplitude

    Height of the wave from the midpoint to the crest or trough, indicating energy.

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    Wave Equation

    Formula relating velocity, frequency, and wavelength: Velocity = frequency × wavelength.

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    Longitudinal Waves

    Waves where particle movement is parallel to wave propagation direction.

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    Transverse Waves

    Waves where particle movement is perpendicular to wave motion.

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    Sound Waves

    Compression waves that travel through a medium, such as air or water.

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    Electromagnetic Radiation

    Energy traveling as waves of electric and magnetic fields, includes visible light.

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    Visible Light Spectrum

    The range of wavelengths of light visible to the human eye, from violet to red.

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    Fats

    Molecules made of long hydrocarbon chains for energy storage and insulation.

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    Vitamin A

    Nutrient essential for vision and maintaining healthy skin.

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    Starch Test

    Test using iodine solution that turns black/blue/purple to indicate starch presence.

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    Photosynthesis

    Process where plants convert sunlight, water, and carbon dioxide into glucose and oxygen.

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    Calcium

    Mineral necessary for the formation and maintenance of healthy bones and teeth.

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    Cornea

    A clear, dome-shaped surface that helps focus incoming light.

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    Pupil

    An opening in the center of the iris that controls light entry into the eye.

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    Retina

    Contains photoreceptor cells that convert light into electrical signals for the brain.

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    Myopia

    Nearsightedness where far objects appear blurry; images focus in front of the retina.

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    Astigmatism

    Vision distortion caused by an irregular cornea shape.

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    Cell Wall

    Rigid structure in plant cells made of cellulose, providing shape and protection.

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    Cytoplasm

    Jelly-like substance inside the cell where most chemical reactions occur.

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    Cell Membrane

    Protective layer that controls what enters and exits the cell.

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    Nucleus

    Cell's control center containing DNA; it directs cell functions.

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    Cellular Respiration

    Process where cells use oxygen to break down glucose for energy (ATP).

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    Mouth

    The beginning of the digestive system where food is mechanically broken down and mixed with saliva.

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    Stomach

    An organ that mixes food with hydrochloric acid to break down carbohydrates and proteins.

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    Small intestine

    A long tube where digestion is completed and nutrients are absorbed through the intestinal walls.

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    Large intestine

    Extracts water from digested food and compacts waste into feces for removal.

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    Diffusion

    The movement of particles from a region of high density to a region of low density.

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    Law of Reflection

    When light hits a surface, the angle of incidence equals the angle of reflection.

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    Pinhole Camera

    A camera that uses a small hole to project an image onto a surface.

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    Refraction

    The bending of light when it enters a new medium, changing its speed and direction.

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    Converging Lens

    A lens that is thickest in the center and bends light rays toward a focal point.

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    Diverging Lens

    A lens that is thin in the center and spreads light rays outward from a focal point.

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    Glucose in Cells

    Glucose enters cells where it is broken down for energy.

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    Glycolysis

    The process in cytoplasm that splits glucose into two pyruvate molecules.

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    Pyruvate

    Product of glycolysis that moves to mitochondria if oxygen is present.

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    Krebs Cycle

    Cycle that breaks down pyruvate to produce energy and CO2.

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    Electron Transport Chain

    Uses oxygen to produce water and ATP in mitochondria.

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