Science Quarter 3 Reviewer: Quantity and Units
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Questions and Answers

Which formula represents acceleration?

  • $Vf = Vi - at$
  • $T = Vf - Vi / A$
  • $Vf = Vi + at$
  • $A = Vf - Vi / T$ (correct)

    • What is the Triangular Method formula for cosine?

  • Soh (Sin = Opposite/Hypotenuse)
  • Cos = Adjacent/Opposite
  • Toa (Tangent = Opposite/Adjacent)
  • Cah (Cos = Adjacent/Hypotenuse) (correct)

    • What does a negative slope on a position-time graph indicate?

  • The object is moving at a constant velocity
  • The object is accelerating
  • The object is slowing down or decelerating (correct)
  • The object is at rest

    • What is the formula for finding the resultant vector using the Graphical Method?

    <p>Align the vectors head-to-tail and draw the resultant from the tail of the first to the head of the last</p> Signup and view all the answers

    What does a flat line on a position-time graph indicate?

    <p>The object is at rest</p> Signup and view all the answers

    What is the formula for finding the tangent of an angle using the Triangular Method?

    <p>Toa (Tangent = Opposite/Adjacent)</p> Signup and view all the answers

    What is the measurement that has both size and direction?

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

    Which measurement describes how far an object travels and does not depend on direction?

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

    What is the difference between an object’s final position and its starting position called?

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

    Which quantity measures how much an object's speed changes over time?

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

    Which measurement represents the rate at which an object is moving, regardless of direction?

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

    What does velocity represent?

    <p>Speed with direction</p> Signup and view all the answers

    Which type of wave refers to the particles of the medium moving back-and-forth parallel to the direction of propagation?

    <p>Longitudinal wave</p> Signup and view all the answers

    What is the distance between two successive identical parts of a wave called?

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

    What is the maximum distance of a particle with respect to its equilibrium position called?

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

    What is the number of identical parts of a wave that pass through a given point per unit time called?

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

    What is the time for one complete cycle of a wave called?

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

    What property of sound waves determines the pitch that we hear?

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

    What is the purpose of units in measurements?

    <p>To describe and compare measured values meaningfully</p> Signup and view all the answers

    Which of the following is NOT a physical quantity?

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

    What is the difference between scalar and vector quantities?

    <p>Scalar quantities have magnitude only, while vector quantities have both magnitude and direction</p> Signup and view all the answers

    Which of the following is a vector quantity?

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

    What is a frame of reference?

    <p>A set of coordinates used to determine positions and velocities of objects</p> Signup and view all the answers

    Which system of units is predominantly used worldwide?

    <p>Metric units (SI Units)</p> Signup and view all the answers

    What does a downward slope on a speed vs. time graph indicate?

    <p>The object is decelerating</p> Signup and view all the answers

    In a transverse wave, how do the particles of the medium move?

    <p>At right angles to the wave propagation</p> Signup and view all the answers

    Which type of wave does not require a medium for propagation?

    <p>Electromagnetic waves</p> Signup and view all the answers

    What does a horizontal line on a speed vs. time graph indicate about the object's motion?

    <p>The object is moving at a constant speed</p> Signup and view all the answers

    What type of wave requires a medium for propagation?

    <p>Sound waves</p> Signup and view all the answers

    What represents acceleration on a speed vs. time graph?

    <p>The slope of the graph</p> Signup and view all the answers

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