6.3 everything is reused

Question 1

molecule

Answer 1

smallest component of a substance, any small particle

Question 2

atom

Answer 2

building block of a molecule, an element

Question 3

molecular formula

Answer 3

a substance written like a formula contain the amount of atoms

Question 4

reducer or decomposer

Answer 4

organisms that break down biological material making it available for plants, bacteria and fungi

Question 5

fossil fuels

Answer 5

oil, natural gass and coal that can be burned to produce energy

Question 6

nitrate

Answer 6

most important mineral for plants, containing nitrogen

Question 7

nitrifying bacteria

Answer 7

bacteria that turn ammonia into nitrates

Question 8

denitrifying bacteria

Answer 8

bacteria that break down parts of nitrates and release nitrogen gas

Question 9

nitrogen-fixing bacteria

Answer 9

bacteria that use nitrogen gas and covert it into nitrates

Question 10

nodules

Answer 10

an outgrowth of the roots of certain plants that can contain nitrogen-fixing bacteria