Current Symbol
I
Current units
Amps (A)
power symbol
p
power unit
watts (w)
voltage symbol
V
voltage unit
Volts (v)
resistance symbol
R
resistance unit
Ohms (Ω)
Define Physical change
A change in which no new substance is formed
Define Chemical change
A change where new substance IS formed
When Copper Carbonate is heated
turns form blue to black, releasing CO2
when iodine solid is heated
solid sublimes into a purple gas
candles are burnt on a scale
the mass decreases
sodium hydroxide is added to copper sulfate
a light blue solid is formed
Unit of Mass
Kg
Unit of force
N
Unit of velocity
ms-1 or m/s
unit of distance
m
unit of time
seconds
Unit of acceleration
m/s/s or ms-2
Sodium reacting with water
Violent fizz
sodium with oxygen
yellow flames
sodium with acid
violent fizzing and sparks
copper with water
no reaction
copper with oxygen
surface turns black
copper with acid
no reaction
lead with water
v small bubbles
copper with oxygen
surface becomes dull
lead with acid
no reaction
magnesium with water
fizzing, test tube hot
magnesium with oxygen
white light and residue
magnesium with acid
fizzing, hot test tube
Formula of hydrochloric acid
HCL
formula copper sulfate
CuSo₄
formula Potassium carbonate
K₂CO₃
formula calcium oxide
CaO
formula sodium hydroxide
NaOH
formula Sulfuric acid
H₂SO₄
define element
pure element w/only 1 type of atom
define compound
pure substance with 2 or more chemically bonded element
define mixture
2 or more elements or compounds NOT chemically combinedd
define Molecule
2 or more atoms chemically bonded
define atom
smallest particle of an element that maintains their chemical properties
define Ion
charged species formed when an atom loses or gains electrons to get a full valence shells
Current in a series is....
The same across the whole circuit
Current in Parallel is...
is divided across components
Voltage in current is....
divided across components
voltage in parallel is...
the same everywhere
Example of physical change
dissolving salt in water
example of chemical change
Boiling an egg
Name Cl⁻
chloride
name O²⁻
oxide
name OH⁻
hydroxide
name CO₃²⁻
carbonate
name Na⁺
Sodium ion
name So₄²⁻
Sulfate
Name Zn(OH)₂
zinc hydroxide
name MgO
Magnesium oxide
name CaCl₂
Calcium chloride
name CuSO₄
Copper sulfate
name Na₂CO₃
Sodium carbonate
name Al(NO₃)₃
aluminium nitrate
name Pb(NO₃)₂
lead nitrate
name CH₃COOH
ethanoic acid
name Al(OH)₃
aluminium hydroxide
name Fe₂(SO₄)₃
Iron (III) sulfate
what is a conductor
Materials that will carry current and allow electrons to move easily through it
what is an insulator
material that won't carry current and does not also electrons to move freely through it
Velocity formula
velocity = distance/time
acceleration formula
a = ∆v/∆t or a =force/mass
Forces). Thrust description
A pushing force (e.g. by an engine)
Forces). Gravity description
Pulls an object towards the centre of a large mass
Forces). Tension description
A force in a rope or cable being pulled
Forces). Friction description
A counter force caused when two objects rub together
Forces). Air Resistance description
A counter force produced when an object travels through the air
Forces). Reaction/Support description
The upward force from a surface to counter weight
Gravity acceleration
10ms⁻² (on earth)
Work is measured in
Joules (J)
Work formula
Force x Distance
Power is _____
The rate at which work is done
Power formula (forces and motion)
Power = Work/Time
Resistance formula
R=V/I
Power formula (electricity)
P=V x I
Forces are ___ or ____
Pushes or pulls
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