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Quiz 1: Energy part 1

Quiz by Mr.MD Showket Hasan

Grade 8
Science
Thailand Core Curriculum

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20 questions
Show answers
  • Q1
    What is the SI unit of energy?
    Watt (W)
    Joule (J)
    Pascal (Pa)
    Newton (N)
    30s
    SC8.E.1
  • Q2
    Which of the following is an example of potential energy?
    A moving car
    A stretched rubber band
    A running dog
    A falling rock
    30s
  • Q3
    What type of energy is stored in food?
    Mechanical Energy
    Chemical Energy
    Thermal Energy
    Kinetic Energy
    30s
  • Q4
    A wind turbine primarily converts:
    Electrical to chemical energy
    Solar to electrical energy
    Mechanical to electrical energy
    Chemical to kinetic energy
    30s
  • Q5
    Which of the following follows the Law of Conservation of Energy?
    Energy disappears in transformation
    Energy changes form but remains constant
    Energy can be created
    Energy is lost in a system
    30s
  • Q6
    A hydroelectric dam converts:
    Kinetic energy of water into electrical energy
    Electrical energy to kinetic energy
    Solar energy to heat energy
    Chemical energy to mechanical energy
    30s
  • Q7
    How does mass affect kinetic energy?
    It is independent of mass
    It increases with mass
    It remains unchanged
    It decreases with increased mass
    30s
  • Q8
    Which of these is an example of energy conversion?
    A stopped wind turbine
    A rock at rest on a cliff
    A burning candle
    A stationary book on a table
    30s
  • Q9
    Why does a roller coaster gain speed as it descends?
    Potential energy is converted into kinetic energy
    Chemical energy is converted into electrical energy
    Mechanical energy is destroyed
    Kinetic energy is converted into potential energy
    30s
  • Q10
    What happens when an object falls freely under gravity?
    Both kinetic and potential energy increase
    Only potential energy increases
    Only kinetic energy increases
    Kinetic energy increases while potential energy decreases
    30s
  • Q11
    Which appliance converts electrical energy into thermal energy?
    An iron
    A television
    A fan
    A light bulb
    30s
  • Q12
    Why does a stretched spring have potential energy?
    It has no stored energy
    It stores energy due to its deformation
    It is heavier than other objects
    It is in motion
    30s
  • Q13
    If a 2 kg object moves at 3 m/s, what is its kinetic energy?
    3 J
    18 J
    6 J
    9 J
    30s
  • Q14
    A 10 kg object is lifted 5 meters above the ground. What is its gravitational potential energy (g=9.8 m/s²)?
    980 J
    490 J
    98 J
    50 J
    30s
  • Q15
    A 5 kg object is moving at 4 m/s. What is its kinetic energy?
    20 J
    10 J
    80 J
    40 J
    30s

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