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


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