science

Cells contains:
~cell wall -provides a strong support and gives the cell its shape
~cell membrane -controls the substances moving in and out of the cell
~cytoplasm -site of chemical reactions
~nucleus -controls activities in the cell and stores genetic information
~vacuole -stores food substances and water(cell sap)
~chloroplast -contains chlorophyll

cells - tissues - organs - system - organism

systems:
~digestive system
~respiratory system
~blood circulatory system
~reproductive system
~skeletal system
~muscular system
~excreratory system
~nervous system

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difference between heat and temperature:

Heat -an energy(Joules)
Temperature -the hotness of a substance=D (Kelvin)

Heat flows by three ways:
~conduction; hot to cool area
~convection; mostly in liquids. even on beaches
~radiation; heat travels through a vacuum