← 5th - Science - Ch 4A - Lesson 4 Review Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All same In an ecosystem, the amount of material stays about the ________________. ecosystem Everything in an ________________ can be used over and over again. energy In an ecosystem, the consumers eat the producers and use _____________ from them to grow. carbon dioxide Producers need ________________, which consumers give off. water During phtosynthesis, producers use light energy to change carbon dioxide and _____________ into sugar and water. respiration The opposite of photosynthesis is __________. sugar + oxygen The chemical equation for photosynthesis is energy from sunlight + carbon dioxide + water = ______________ + _____________. energy + water The chemical equation for respiration is: sugar + oxygen = carbon dioxide + _____ + ______. photosynthesis and respiration two processes that are part of the carbon dioxide-oxygen cycle nitrogen Another important cycle is the ____________ cycle. nitrogen _____________ is part of all proteins proteins _____________ are the materials cells use for growth and repair. stays the same Nitrogen is used over and over so that the amount of nitrogen _____________. gas Nearly 80% of the air we breathe is nitrogen ____________. compounds Most organisms need nitrogen gas to change into nitrogen ________________. lightening and bacteria 2 ways to change nitrogen gas into nitrogen compounds food web When animals eat plants and then are eaten by another animal, the usable nitrogen flows through the ____________. soil When decomposers break down wastes and dead organisms, they return nitrogen compounds to the _____________. nitrogen gas Some bacteria that live in the soil can then change nitrogen compounds back into ___________. nitrogen cycle The ____________ is the cycle that changes nitrogen gas into nitrogen compounds and the back into nitrogen gas. water cycle The _____________ is when water evaporates from the ground, condensation forms in clouds, and precipitation falls to the ground. living and nonliving Water cycles through the __________ and ______________ parts of an ecosystem so no new water is needed.