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GRADE 8 SCIENCE

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  • what's the answer?
    Nitrogen, Potassium Phosphorus
  • True or false?
    False
  • what's the answer?
    Periodic table
  • Write the word equation for resistance.
    RE= voltage / Current
  • Give one difference between aerobic and anaerobic respiration.
    aerobic uses oxygen, anaerobic doesn't....
  • what's the answer?
    anaerobic respiration
  • what's the equipment?
    Voltmeter
  • name te law
    Ohm's law
  • True or False?
    True
  • what the angle with the downward arrow called?
    angle of incidence
  • Yes or No?
    Yes
  • what the angle with the upward arrow called?
    angle of reflection
  • what's the answer?
    A= alveoli
  • Give and explain two (2) factors that affects resistance.
    temperature, width of wire, length of wire, type of the material.
  • The current through a bulb is 0.5 A when the voltage across it was 19 V, what is the resistance?
    r= 19/0.5 =38 ohms
  • As the prey population increases, what happens to the predator population? Suggest one reason why this might happen.
    The predator population increases. because there is more food available
  • Give one difference between chemosynthesis and photosynthesis
    Chemosynthesis requires chemical reaction but photosynthesis requires sunlight...
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