human
chemistry
matter
mass
mg, g, kg
density
D=m/V
space
volume
ml, L
pure substance
element
atom
molecules
electron
nucleus
proton
neutron
ion
cation
anion
bonding
ionic bond
covalent bond
molecules
cell
group of cell
organism
solid
Li(Lithium)
liquid
Br(Bromine)
gas
H(Hydrogen)
metal
Na(sodium)
nonmetal
O(oxygen)
compound
atom
bohr-rutherford diagrams
mixture
mechanical mixture
solution
particle theory of matter
Ecology
environment
ecosystem
forest
aquatic
grassland
desert
sustainable
biotic factor
abiotic factor
food chain
autotrophs
heterotrophs
decomposer
food webs
human
climate change
burning fossil fuels
deforestation
fertilizer
Electricity
Electricity generate
solar energy
hydroelectricity
wind energy
power
watt
P= V x I
energy
universe
kilowatt-hour
efficiency
Renewable energy
fossil fuels
non renewable enerrgy
static
current
circuit
series
parallel
I=Q/t
insulator
conductors
electron
an object
charging by friction
charging by induction
charging by contact
resistance
ohms
R=V/I
electric potential
direct current
alternating current
Space
astronomy
celestial object
universe
big bang theory
star
planet
earth
sun
electromagnetic spectrum
satellite
atom
earth
lithosphere
atmosphere
hydrosphere
biosphere
hotter temperatures