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G5 Checkpoint Science Revision

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  • What bones protect our lungs?
    The ribs.
  • What do you predict would happen to your pulse if you pedalled your bike faster?
    It would get faster.
  • What does bpm stand for?
    beats per minute
  • When we breathe in, describe the path the oxygen takes.
    nose / mouth --> windpipe --> lungs --> blood
  • The left side of the heart pumps blood that contains __________.
    oxygen
  • What does the blood coming from the lungs contain?
    Oxygen.
  • What do we call substances that do not conduct electricity?
    Electrical insulators.
  • Name four living things that cause disease.
    Parasites, viruses, bacteria and fungi.
  • Draw the electrical symbol of two 1.5V cells.
  • What are two ways we can prevent insect bites?
    Sleep under bed nets, wear long sleeves and trousers, keep doors and windows closed at night, use insect repellent, burn mosquito coils to keep them away.
  • Name the four parts of the respiratory system.
    nose, windpipe, lungs and diaphragm.
  • What does the heart pump through the body?
    Blood.
  • What is the circulatory system made up of?
    heart, blood vessels and blood
  • Draw the electrical symbol of a 3V battery.
  • Name three ways we know that a chemical reaction has taken place.
    Gas (bubbles) is produced; there is a change in colour; there is a change in temperature.
  • What does the stomach contain to defend against diseases?
    Acid.
  • Describe the term "boiling point".
    The temperature at which a liquid becomes a gas.
  • Use the particle model to explain dissolving.
    When a solute dissolves, the particles of the solute move between the particles of the solvent.
  • Draw the electrical symbol of a buzzer.
  • Your heart pumps blood through the body. This process is called _________.
    circulation.
  • What are two differences between boiling and evaporation?
    Boiling: Happens at a certain temperature; Happens throughout the liquid Evaporation: Happens at any temperature; happens at the surface of the liquid.
  • Name two ways to increase the dissolving rate.
    Stirring and heating the solvent.
  • Why does a metal teaspoon feel hotter than a plastic teaspoon when you put them in a cup of hot tea?
    This is because metal is a thermal conductor.
  • Why does Neptune have the longest orbit?
    Because it is the furthest planet from the Sun.
  • What are the two parts of a solution?
    The solute and the solvent.
  • Explain why a physical change is reversible.
    This is because a physical change alters how a substance looks and feels. It does not change into a new substance.
  • Heat is a type of energy transfer. What is this type of energy transfer called?
    Conduction.
  • What are two ways we can control the spread of disease?
    Good hygiene and preventing insect bites.
  • Explain what happens to the light as it enters the glass block. What is this called?
    As the light enters the block, it gets bent. It then travels in a straight line until it exits the block and bends again. This is called refraction.
  • What does the blood travelling to the lungs contain?
    Carbon dioxide.
  • Which body system is used for breathing?
    The respiratory system.
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