Science 3.0 ovo Flashcards
what is cromotography
the teqhnique that uses a difference in solubility to seperate a mixture
what is in an animal cell
cell memebrane, cytoplasm,nucleus,mitrochondria
what is in a plant cell
cell,chloroplast,vacuole and the rest is the same as the animal cell
State the function of the nucleus and cell membrane
Nucleus-stores DNA
Cell membrane-lets substances in and out
function of cytoplasm and cell wall
cytoplasm-sight of chemical reactions
cell wall-helps support and protection
function of vacuole and chloroplast
vacule-food digestion
chloroplast-photosynthesis
Function of mitochondria
respiration / energy release
Define osmosis.
The movement of water from an area of high concentration to an area of low concentration.
types of energy stores
chemical,kenitic,gravational,vibrational,elastic potential,thermal or internal,magenetic,electrostatic,nucleur
List energy pathways.
Mechanical,electrical,heat,radiation
what is internal energy
the sum of the kenetic and potiential energy stores of all the particles in a system
meaning of temperature
the average kenitic energy of each particle in the material
what is conservation of energy
energy can neither be destrpyed or created it is just moved
how much calories does an adult need
8400 kj
how much is one calorie = joules
1 calorie= 4.2 joules
meaning of kenitic
like thermal energy
meaning of electrical potential
always attracted to each other
Define thermal equilibrium
When the temperature on both sides is equal.
Define convection
As air gets hotter the particles move quicker and move further apart as the air expands and becomes less dense and rises to be replaced with colder air which is more denser and falls down again.
