- Which human activity would most likely decrease the amount of carbon in the atmosphere?clearing forestsheating coalburning woodplanting trees
- Which process occurs when bacteria converts nitrogen gas to a usable form?decompositioncondensationfixationtranspiration
- After Gerry mows his lawn, he often puts the grass clippings into his flower garden.How will this affect his garden?- It will decrease the amount of carbon in the soil and decrease the amount of carbon dioxide released by decomposers.- It will increase the amount of carbon in the soil and decrease the amount of carbon dioxide released by decomposers.- It will decrease the amount of carbon in the soil and increase the amount of carbon dioxide released by decomposers.- It will increase the amount of carbon in the soil and increase the amount of carbon dioxide released by decomposers.
- Which processes result in the release of carbon? Select three options.- Animals break down food molecules to obtain energy.- The remains of producers are broken down by decomposers.- The remains of consumers are broken down by soil decomposers.- Producers take in carbon dioxide.- Producers make sugars and starches.
- Kate wrote the steps of the carbon cycle to describe how carbon is cycled through specific organisms. The steps are in random order.1 - The rabbit decomposes.2 - The rabbit eats the carrot plant.3 - The carrot plant takes in carbon dioxide from the air during photosynthesis.4 - Carbon compounds are returned to the soil.Lists the steps in order.
- Cleo has a vegetable garden and wants to increase the amount of nitrogen in the soil.How can she most likely do this?- add several soybean plants to her garden- decrease the amount of fertilizers she uses- harvest the vegetable plants continuously- reduce the number of decomposers that live in the soil
- Which best describes a role of animals in the water cycle?- They help water vapor condense when they produce waste.- They help water vapor condense when they inhale.- They release water vapor through transpiration.- They release water vapor when they exhale.
- Which organisms release carbon dioxide as waste?consumers onlyconsumers and decomposersproducers and decomposersproducers only
- Which best explains why a thick tropical forest filled with large plants typically has a lot of water vapor in the air?The plants undergo transpiration.The plants undergo condensation.The plants prevent water from evaporating.The plants prevent water from becoming runoff.
- Which best compares the roles of nitrogen-fixing bacteria and certain decomposers in the nitrogen cycle?- Both organisms convert free nitrogen into nitrogen-containing compounds.- Both organisms convert nitrogen-containing compounds into free nitrogen.- The bacteria convert free nitrogen into nitrogen-containing compounds, while the decomposers convert nitrogen-containing compounds into free nitrogen.- The bacteria convert nitrogen-containing compounds into free nitrogen, while the decomposers convert free nitrogen into nitrogen-containing compounds.
- Scott made a model of the water cycle by filling a tub with water, covering the tub with clear plastic, and placing a heat lamp over the tub. After a few days, he observed water droplets collecting on the plastic wrap.What process formed the water droplets in Scott's model?evaporationtranspirationcondensationprecipitation
- During which process of the water cycle does water change from a gas to a liquid?precipitationcondensationtranspirationevaporation
- How do plants obtain nitrogen?They remove it from the air.They absorb it through their roots.They fix it in their leaves.They produce it in their stems.
- What is free nitrogen?- nitrogen that is ready for plants to use- nitrogen that has been fixed by bacteria- nitrogen that cannot be used by organisms- nitrogen that is returned to the soil by decomposers
- During the nitrogen cycle, through which structure are nitrogen compounds first absorb into the plant?rootsleavesflowerstem
- Carbon, nitrogen, and water are recycled through ecosystems many times. Which one of these eventually breaks down completely?
- Which statements accurately describe the roles of decomposers in the carbon cycle? Select three options.- Decomposers release carbon dioxide into the air as waste.- Decomposers remove carbon dioxide from the air during photosynthesis.- Decomposers break down the remains of dead plants and animals.- Decomposers return carbon compounds to the soil.- Decomposers use carbon to make food molecules.
- Some consumers, like lions, do not eat plants or any other producers. They only eat other animals.How do lions obtain the carbon they need?- by eating animals that have carbon-based molecules stored in their bodies- by breathing it in from the atmosphere in the form of carbon dioxide- by absorbing carbon-based molecules through their skin from the soil- by drinking water that contains carbon dioxide
- Once water vapor has been released into the atmosphere, it rises and cools, turning back into a liquid. What is this process called?evaporationcondensationfixationprecipitation
- ___ are marked by two foul lines. Each line extends from home plate.