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Sci 8/9 Final Exam Review

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  • In an electrochemical cell, the two different metals are called
    electrodes
  • Which letter represents the angle of reflection?
    E
  • What is the name of this compound N2Cl7
    dinitrogen heptachloride
  • When a light ray travels from a less dense to more dense medium, it will...
    slow down or refract towards the normal
  • When resistance increases, current will
    decrease
  • What is the name of this compound MgI3
    Magnesium iodide
  • I = 10 A; R = 1500 ohms; V = ?
    15 000V
  • Solid, liquid, or gas - will take shape of whatever container it is in (2)
    Liquid & gas
  • Formula for sodium fluoride
    NaF
  • What is the name of the following compound? Hint: Multi-valent metal + polyatomic Cu(OH)2
    Copper (II) hydroxide
  • What is the name of this compound? CCl4
    Carbon tetrachloride
  • What does this symbol represent?
    cell
  • What does this symbol represent?
    resistor
  • A 615 watt refrigerator runs 24 per day. How much would cost at 8 cents per KwH to run for a month?
    $35.42
  • What is the formula for carbon trioxide?
    CO3
  • I = ?; R = 200 ohms; V = 240 V
    1.2 A
  • Is this a property of ionic or covalent? conducts electricity when dissolved in water
    Ionic
  • Another name for heat energy
    thermal
  • Night vision goggles use this type of EM wave to see in the dark
    infrared
  • What is the formula for Iron (III) Chloride?
    FeCl3
  • This type of EM ray causes sun tans and sun burns
    UV (Ultraviolet)
  • A concave lens makes light rays that pass through it converge/diverge?
    diverge
  • Longest waves on the electromagnetic spectrum
    radio
  • A circuit that has only one path for electricity to flow is called a
    series circuit
  • 1, 2, 3 = Which one is most efficient?
    1
  • I = 15 A; R = ?; V = 110 V
    7.33 ohms
  • These type of EM rays are used to take pictures of bones
    x-rays
  • P = 6 W; I = 3A; V =?
    2 V
  • Which letter represents the incident ray?
    A
  • The best electrolyte to use in an electrochemical cell would be .... (2 possible answers)
    Acid or salt water
  • Energy from the sun is called
    solar energy
  • Which source of electricity is primarily used in BC?
    Hydroelectric
  • Is this a property of ionic or covalent? generally cannot dissolve in water
    Covalent
  • What is one advantage of using a parallel circuit over a series circuit?
    If one electrical device breaks in the circuit, the others will keep working; same voltage throughout
  • Is this a property of ionic or covalent? made of two or more non-metals
    Covalent
  • The voltage is the same/different everywhere in a parallel circuit
    Same
  • static electricity is caused when ________ causes electrons to fall off/leave
    rubbing/friction
  • Food coloring spreads out faster in hot water than in cold water. This is mainly because:
    The water molecules in hot water move more quickly
  • The angle of reflection is _______ to the angle of incidence
    equal/the same
  • When voltage increases, current wil
    increase
  • This is a material that allows electrons to flow easily through it
    conductor
  • What energy transformation happens in a battery powered flash light? (3)
    chemical -> electrical -> light
  • Which letter represents the normal?
    B
  • Transparent, translucent, opaque - allows all light to pass through
    transparent
  • Solids, liquids, gas? Has a fixed shape and volume
    Solid
  • What is the name of this compound Na3N
    sodium nitride
  • The view close objects the eye muscles must relax/contract?
    contract
  • Solids, liquid, gases: which has particles that move the fastest?
    Gas
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