science and natural world
cannot change under certain natural conditions
what is scientific law
what are all living things made of
what are cells
what has a definite make up
what is chemical substances
what are carbohydrates
what is 75% of the surface of the world made of
what is water
science
helpful genes that are passed down through generations
what is natural selection
made out of the same atom
is a fat or oil with many uses like storing energy
what is lipids
sum of all the reactions within a organism
what is a metabolism
what doesn't change during an experiment
what is a constant
characteristics that are passed to offspring
what is genetictheroy
made out if multiple atoms
what are compounds
made up of chains of amino acids
what are proteins
sped up reactions in cells
what are enzymes
what is used for comparison in a experiment
something that changes overtime
what is evolution
contains carbon and is found in living organisms
what is organic compounds
made up of smaller pieces called nucleotides
what are nucleic acids
0 to 7 on the pH scale
what is an acid
changed by the experiment
what is the independent variable
when different species fight for one thing
what is competition
we need this for life on earth its self
what is carbon
main components of cells membranes
what are phospholipids
7 to 14 on the pH scale
what is a base