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7th grade Energy & States of Matter

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  • Thermal energy depends on how particles move within a substance.
    True
    False
  • Which factor most influences particle movement?
    Energy level
    Container shape
    Particle size
  • Potential energy is energy stored due to an object's position or condition.
    True
    False
  • Particles in a solid:
    Move freely
    Are randomly distributed
    Vibrate in a fixed position
  • Particles in liquids have what unique characteristic?
    Absolute stillness
    No fixed pattern
    Fixed position
  • Heat is a form of energy.
    True
    False
  • The formula for gravitational potential energy is PE = m × g × h.
    False
    True
  • Chemical potential energy is found only in electrical circuits.
    True
    False
  • Brownian Motion provides evidence of:
    Particle immobility
    Particle uniformity
    Constant particle movement
  • What is the name of the process when gas changes into a liquid?
    Freezing
    Melting
    Condensation
  • Gases have more energy than solids.
    True
    False
  • What tool would you use to measure the temperature of a substance?
    Thermometer
    Scale
    Ruler
  • Light energy cannot travel through space.
    True
    False
  • Light energy is the only type of energy visible to human eyes.
    True
    False
  • Which state of matter can be compressed most easily?
    Gases
    Solids
    Liquids
  • In liquids, particles can:
    Slide past each other
    Remain in a rigid structure
    Stay completely still
  • All matter is made up of tiny particles.
    False
    True
  • Thermal energy cannot be measured by any means.
    True
    False
  • Which state of matter will ALWAYS take the shape of its container?
    Gas
    Liquid
    Solid
  • Which state of matter has a definite volume but no definite shape?
    Solid
    Gas
    Liquid
  • The arrangement of particles most directly influences:
    The state of matter
    The color of matter
    The weight of matter
  • In gases, particles:
    Remain in a fixed position
    Are tightly packed
    Are far apart and move quickly
  • Potential energy is a form of energy that is always moving.
    True
    False
  • What happens to gas particles when compressed?
    They become liquids
    They disappear
    They can be pushed closer together
  • Which of these best describes a gas?
    Fixed shape and fixed volume
    No fixed shape and no fixed volume
    Fixed volume but no fixed shape
  • Brownian Motion demonstrates:
    Particles are perfectly organized
    Particles are always moving randomly
    Particles are stationary
  • Why does a solid melt into a liquid when heated?
    Particles gain energy and move more freely
    The particles become smaller
    Particles lose energy and freeze
  • Which type of energy is involved when an object is lifted upward?
    Gravitational potential energy
    Sound energy
    Thermal energy
  • What do we call the process of a solid changing directly into a gas?
    Condensation
    Sublimation
    Evaporation
  • According to the Particle Theory, what determines the state of matter?
    Weight
    Particle arrangement and energy
    Color
  • When particles vibrate in place but cannot move freely, this describes:
    Liquid state
    Solid state
    Gaseous state
  • Why do solids maintain a fixed shape?
    Their particles are tightly packed in a fixed, regular pattern
    Their particles move freely
    Their particles can slide past each other
  • Freezing occurs when:
    A gas changes into a liquid
    A solid gains heat and melts
    A liquid loses energy and becomes a solid
  • What causes the random movement of tiny particles in Brownian Motion?
    Gravity
    Magnetic fields
    Collisions with other molecules
  • A balloon expanding when you blow air into it demonstrates:
    Liquid state properties
    Solid state properties
    Gas state properties
  • Why do gases fill the entire container they’re in?
    They are heavier than liquids
    They have no particles
    Their particles move fast and spread out
  • Liquids have which unique characteristics?
    Fixed shape and fixed volume
    No fixed shape but fixed volume
    No fixed shape and no fixed volume
  • The term "incompressible" most directly relates to:
    Gases
    Plasma
    Liquids
  • Robert Brown's observations were significant because they:
    Measured particle speed
    Created a new scientific instrument
    Proved matter is made of moving particles
  • Which statement best describes why water can flow?
    Its particles are tightly packed
    Its particles are completely stationary
    Its particles can slide past each other
  • The formula PE = h ÷ (m × g) is used to calculate gravitational potential energy.
    False
    True
  • Energy can be created from nothing.
    False
    True
  • Chemical potential energy is related to the breaking or rearranging of chemical bonds.
    False
    True
  • As temperature increases, the movement of particles will:
    Increase
    Stay the same
    Stop
  • Solids take the shape of their container.
    False
    True
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