intro
what is science?
way of gaining knowledge about the naturaul world
what is the nucleus?
the control center of the cell
what is an organism
individual living thing
Matter
Anything that has mass and takes up space
simple diffusion
movement of molecules without using energy, high to low concentration (ex: carbon dioxide and oxygen)
what is scientific law?
statement that cannot change under certain natural conditions
What are mitochondria?
powerhouse of the cell that produces ATP
what is symbosis
close relationship between species
chemical Substances
have a definite make up
osmosis
movement of water across a membrane, high to low
what is observation?
the 5 senses
What are chloroplasts?
traps sunlight for photosynthesis
cell theory
living things are made of cells
element
all the same type of atom
facilitated diffusion
movement of larger molecules, need help from transport proteins to get across membrane.
what is an independent variable?
the variable that can be changed by the expirimentor
what are ribosomes
the cell that makes protein
gene theory
characteristics are transferred from parents to offspring within chromosomes (DNA)
compound
2+ elements bonded together
equillibrium
equal amount of concentration on both sides of membrane
what is a dependent variable?
the variable that can be affected by others
what is the cell wall?
protective layer of the cell
homeostasis
keeping this constant
Carbohydrates
sugar or starch used to store energy
endocytosis
material coming into the cell - the membrane surrounds the material and pinches off to form a vesicle that moves through the membrane and into the cell