Please enable JavaScript.
Coggle requires JavaScript to display documents.
**Revision Y9 Science, UNIT 6 - ELECTRIC CIRCUITS, DONT MOVE THE BRANCH…
**Revision Y9 Science
Unit 2 Plant Biology
photosynthesis
carbon dioxide
water
Nutrients
Minerals
Nitrogen
Potassium
Transpiration
Soil
Root hair
Root
Stem
Leaves
Evaporates
Resparation word equation=gluecose+O2->HO2+CO2+Energy ATP
Unit 4 Sound
longitudinal wave
Parallel
Compresses then rarefraction
Crest and Trough
transverse wave
Crest and Trough
amplitude
effects energy
wave length
Frequency
Hertz
High and low pithc
Crest to crest and trough to trough
Loudness
High and low amplitude
Unit 3 Chemical structure and Properties
Bohr's model
Dalton's model
Thomas's plum pudding model
Rutherford's model
Atoms are made out of proton, neutron and electron
Electron orbits
Proton-positive
Neutron-neutral
electron-negative
Properties
physical properties
malleable
sonorous
ductile
strong
brittle
Intesive Physical Properties
Ductility
Malleability
Conductivity
Heat tranfer
Boiling point
Melting point
Colour
Desity
UNIT 5 - INHERITANCE AND EXCRETORY SYSTEM
INHERITANCE
DNA
CHROMOSOMES
23 pairs of chromosomes in a human cell
GENES
DEVELOPMENT OF FETUS
EXCRETORY SYSTEM
Unit 1Chemical Bonding
Ionic Bonding
Covalent Bonding
Atom
Nucleus
protons and nutrons
the number of protons = number of electrons
shells
electrons
electrons on the outer most shell is called valence electrons
The outer shell needs 8 electrons
2 or more atoms bonding to have full outer shells
Cation
Anion
have negative charge
have more electrons than protons
have positive charge
more protons than electrons
ionic bonds: an atom transfers an or more electron to a another atom
protons, neutrons and electrons
protons=positive
neutron=neuatral
electrons=negative
Heat energy
Heat dissipation
Volatility
Radiation
Can transfer energy through empty space
Transmitted in a form of rays or waves or particles-
Evaporation
Transfer of heat by waves. Such as heat of the sun
Conduction
Transfer of heat or electric current from one substance to another by direct conyact
Convection
Occurs in gases and liquids
Transfer of heat through fluid (liquid and gas) caused by molecular motion
Temperature
thermometer
Measures the heat of an object (Celsius or joules)
Heat energy transfer from hot to cold object
How hot or cold an object is.
UNIT 6 - ELECTRIC CIRCUITS
Measurement
Resistance (Ohm) (Ω)
(R = V/I)
Ampere (A)
Measured by an Ammeter or (I=V/R)
Volt (V)
Measured by an Voltmeter or (V = I/R)
How to calculate resistance
R=V/I
WHERE TO ADD VOLTMETER AND AMMETER TO A CIRCUIT?
COMPONENTS
BUZZER
RESISTOR
AMMETER
Cell
Battery Of Cell
SWITCH
VOLTMETER
LIGHT BULB
WIRE
DEFINITIONS OF ELECTRIC CURRENT, ELECTRIC POTENTIAL, AND RESISTANCE
Electric current - the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit
PARALLEL VS SERIES CIRCUIT
DONT MOVE THE BRANCH UNLESS NEEDED