Study

ice melting and boiling of water

  •   0%
  •  0     0     0

      Back   Restart
  • What happens to the temperature just before ice starts to melt?
    It falls below 0°C
    It rises to 0°C
    It stays at room temperature
  • At what temperature does pure ice begin to melt?
    50°C
    0°C
    100°C
  • Which conclusion is correct if ice melts faster in a warmer room?
    Higher temperature increases melting rate
    Ice melts only at 0°C
    Cold air produces heat
  • Which safety rule should be followed when heating water?
    Hold the beaker with bare hands
    Use heat-resistant gloves or tongs
    Fill the beaker to the top
  • What should be recorded during an investigation of boiling water?
    Temperature at regular time intervals
    Colour of the container
    Size of the beaker
  • Why is a thermometer used during an investigation of melting ice?
    To make the ice melt faster
    To measure the temperature change
    To stir the ice
  • What does a flat line on a temperature–time graph during melting show?
    The temperature stays constant during melting
    The ice cools down
    The temperature increases quickly
  • What happens to particles in ice as it melts?
    They gain energy and move past each other
    They lose energy and stop moving
    They change into gas
  • What happens to the temperature of ice while it is melting?
    It remains constant until all ice melts
    It increases steadily
    It decreases
  • Why does crushed ice melt faster than a large ice cube?
    It has a larger surface area
    It has more mass
    It is colder
  • Which piece of equipment is safest to use when heating water?
    A ruler
    A beaker
    A thermometer case
  • Why should a lid not be tightly closed when heating water?
    To make water boil faster
    To allow steam to escape safely
    To stop evaporation
  • Why should the thermometer bulb be placed in the ice during a melting investigation?
    To warm the thermometer
    To measure the ice temperature accurately
    To make the ice melt faster
  • Which result shows that a fair test has been carried out?
    No measurements are taken
    Only one variable is changed
    All variables are changed
  • What change of state occurs when ice melts?
    Solid to gas
    Liquid to gas
    Solid to liquid
  • What observation shows water is close to boiling?
    The temperature drops suddenly
    Small bubbles form at the bottom
    Ice forms in the water
  • Which variable should be kept the same to make an ice melting investigation fair?
    The time taken to melt
    The temperature recorded
    The amount of ice used
  • Which change of state is reversible?
    Burning paper
    Rusting iron
    Melting ice into water
  • Why should the same heat source be used when comparing boiling times?
    To cool the water
    To change the boiling point
    To keep the test fair
  • What happens to the mass of ice after it melts?
    It increases
    It stays the same
    It decreases
  • What change of state occurs when boiling water becomes steam?
    Liquid to gas
    Solid to liquid
    Gas to liquid
  • Which factor can affect the boiling point of water?
    Height above sea level
    Colour of the beaker
    Amount of water
  • What effect does adding salt have on ice in an investigation?
    It raises the melting point
    It stops melting completely
    It lowers the melting point of ice
  • What is the correct conclusion from investigating melting and boiling?
    Heat causes a change of state
    Heat destroys matter
    Heat reduces particle movement
  • What is the boiling point of pure water at sea level?
    50°C
    0°C
    100°C
  • What happens to water particles when water boils?
    They stop moving
    They gain energy and move far apart
    They lose energy and slow down
  • How can you tell that water has reached its boiling point?
    The water level drops
    Bubbles form throughout the liquid
    Steam slowly rises from the surface
  • Why does water boil faster in a metal container?
    Metal absorbs cold
    Metal lowers the boiling point
    Metal conducts heat better
  • Why should temperature be measured at regular time intervals?
    To observe changes clearly
    To finish the experiment quickly
    To avoid using a graph
  • Which statement about changes of state is correct?
    No new substance is formed
    The particles stop moving
    A new substance is produced
    • Your experience on this site will be improved by allowing cookies.