Science Terms

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

Forces affect the ____ and ___ of an object

Motion and shape

How forces change the motion of an object

accelerate, decelerate, direction

How forces change the shape of an object

stretch, compress, twitch