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Science Half-Year 8

TermDefinition
Biosphere all living things on earth
Hydrosphere all bodies of water on earth including ponds, rivers and lakes
Lithosphere the upper layer of rock and magma
Atmosphere the air
Biotic factors referring to organisms
Abiotic factors non-living aspects of an ecosystem such as the wind, salinity and shelter
Habitat an area with organisms with similar abiotic conditions
Population all individuals of one species in a habitat
Ecosystem the biotic and abiotic factors in an area
Commuity all the populations in a habitat
Gluecose a sugar molecule that stores energy molecules can use
Photosynthesis a chemical reaction when carbon dioxide and water create glucose and oxygen
Respiration a chemical reaction that is the reverse of photosynthesis, it releases energy
Autotroph an organism that makes its own food
Heterotroph an organism that gets its food from other organisms
Herbivore an organism that only eats plants
Carnivore an organism that only eats animals
Omnivore an organism that eats both
Detritavore an organism that eats decomposing organisms
Food chian a list of organisms showing what eats what
Ratio total area of habitat / area surveyed
Population estimate ratio * number counted
Prokaryote a cell without a nucleus
Eukaryote a cell with a nucleus
Area of quadrats number of quadrats * area
Eutrophication when protozoan algae and cynobactiera grow too much to excess nutrients
Pathogen a microorganism that could potentially cause disease
Introduced species an organism that is not native or natural to an ecosystem
Biological control use of natural predators or pathogens to control pest population
Biodiversity the number of species in an ecosystem
Kinetic energy moving energy
Gravitational Potential energy due to height
Chemical Potential energy energy in the bonds between atoms
Elastic Potential energy due to squashing or stretching
Sound energy waves moving through substance
Thermal energy due to particles vibrating
Electrical energy moving charge
Nuclear energy inside an atomic nucleus
Electromagnetic energy a light, microwave, x-ray
The law of conservation of energy Energy can not be created or destroyed, only moved from one form to the other
Unit of energy Joules
E.E (useful output energy / input energy) * 100
K.E 1/2m(v) squared
G.P.E mgh
T.E m * c * triangle T
Conduction thermal energy moves due to particles colliding (particles don't change location)
Convection thermal energy moves due to particles heating up, taking more space and floating upwards
Radiation thermal energy moves due to particles travelling through a vaccum
Safe circut Every loop must have a resistor light bulb or voltmeter.
Electrons are opposite to: Protons
Currant The number of charges moving past a certain point per second
DC Direct currant, electrons moving through a loop in one direction
AC Alternating currant, electrons moving back and forth
Conventional currant The flow of imaginary positive charges
Electrons are: Negative
Series the components where the currant through one component must pass through the other
Parallel where the currant passes through one component and not the other and vice versa
Created by: atash_789