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Semester 2 Science Grade 8 Revision

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  • What is the reason for the tides?
    The Moon's gravity
  • What is the reason of ocean currents?
    wind or earth's rotation or shape of ocean
  • Which one is hotter 60oN or 40oN?
    40oN
  • What effect on climate does warm current have?
    more rain, more flood, high tide or any other appropriate answer
  • The Sun heating ocean. What type of energy transfer is happening here?
    radiant => thermal
  • Use 2 words to explain why metal spoon feels hotter than chopsticks in soup
    specific heat
  • What affects the climate?
    Current or Sun or Moon or Wind
  • Why does it feel hot when you touch sand during the day?
    heat from sand is transferred to heat from hand
  • Which one has more precipitations: 10oS or 60oS?
    10oS
  • The temperature of A is 5 and temperature of B is 7 , what would be the temperature after you mix both liquids?
    6
  • Boiling water is an example mainly of - conduction, convection or radiation?
    mainly convection
  • Which one has more thermal energy - 30 oC 200 mL cup or 20 oC 1 L cup?
    20 oC 1 L cup
  • What is the latitude of equator?
    0o (degrees)
  • What is the reason for currents to move clockwise in the Northern Hemisphere and anti-clockwise in Southern Hemisphere?
    Coriolis effect or Earth's rotation
  • How many gyres are there on Earth?
    5
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