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Sci 8/9 Final Exam Review
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Solids, liquids, gas? Has a fixed shape and volume
Solid
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1, 2, 3 = Which one is most efficient?
1
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Energy from the sun is called
solar energy
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What is the formula for carbon trioxide?
CO3
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Solids, liquid, gases: which has particles that move the fastest?
Gas
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P = 6 W; I = 3A; V =?
2 V
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Which letter represents the incident ray?
A
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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
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This is a material that allows electrons to flow easily through it
conductor
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This type of EM ray causes sun tans and sun burns
UV (Ultraviolet)
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Night vision goggles use this type of EM wave to see in the dark
infrared
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I = ?; R = 200 ohms; V = 240 V
1.2 A
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In an electrochemical cell, the two different metals are called
electrodes
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What is the name of this compound? CCl4
Carbon tetrachloride
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What does this symbol represent?
resistor
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The view close objects the eye muscles must relax/contract?
contract
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What is the name of the following compound? Hint: Multi-valent metal + polyatomic Cu(OH)2
Copper (II) hydroxide
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These type of EM rays are used to take pictures of bones
x-rays
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When a light ray travels from a less dense to more dense medium, it will...
slow down or refract towards the normal
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What does this symbol represent?
cell
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Solid, liquid, or gas - will take shape of whatever container it is in (2)
Liquid & gas
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The angle of reflection is _______ to the angle of incidence
equal/the same
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Longest waves on the electromagnetic spectrum
radio
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A circuit that has only one path for electricity to flow is called a
series circuit
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What energy transformation happens in a battery powered flash light? (3)
chemical -> electrical -> light
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I = 10 A; R = 1500 ohms; V = ?
15 000V
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When resistance increases, current will
decrease
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I = 15 A; R = ?; V = 110 V
7.33 ohms
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Which source of electricity is primarily used in BC?
Hydroelectric
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static electricity is caused when ________ causes electrons to fall off/leave
rubbing/friction
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Is this a property of ionic or covalent? conducts electricity when dissolved in water
Ionic
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Formula for sodium fluoride
NaF
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The best electrolyte to use in an electrochemical cell would be .... (2 possible answers)
Acid or salt water
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A concave lens makes light rays that pass through it converge/diverge?
diverge
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What is the name of this compound N2Cl7
dinitrogen heptachloride
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What is the formula for Iron (III) Chloride?
FeCl3
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A 615 watt refrigerator runs 24 per day. How much would cost at 8 cents per KwH to run for a month?
$35.42
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What is the name of this compound MgI3
Magnesium iodide
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When voltage increases, current wil
increase
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Is this a property of ionic or covalent? generally cannot dissolve in water
Covalent
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The voltage is the same/different everywhere in a parallel circuit
Same
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Transparent, translucent, opaque - allows all light to pass through
transparent
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What is the name of this compound Na3N
sodium nitride
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Another name for heat energy
thermal
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Which letter represents the normal?
B
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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
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Is this a property of ionic or covalent? made of two or more non-metals
Covalent
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Which letter represents the angle of reflection?
E
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