environment

species diversity

ecosystem diversity

sustainability/renewable

Earth is a .....

what are the 4 most common elements in a living thing?..

chemical energy is found where..

matter=

what are the 4 Elements in a living thing

what is a chemical compounds

high energy compounds are?

in a chemical reaction the ___ dont change the ___ do.

the measure of carbon energy is?..

energy transformation

we lose __% of what we eat due to ___

respiration

photosynthesis can build...

all carbon came from..

CO2 is a ___ energy compounds

what does photosynthesis need in order to work?

energy efficiency

ecosystem

biotic

abiotic

what are the trophic levels

what are the reservoirs?