Cycles of Matter Answers

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?

Cleo has a vegetable garden and wants to increase the amount of nitrogen in the soil.How can she most likely do this?

Which process occurs when bacteria converts nitrogen gas to a usable form?

Some bacteria live in the roots of plants like soybeans and peas.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen.

Which human activity would most likely decrease the amount of carbon in the atmosphere?

How is the nitrogen cycle important to humans?

Which best describes a role of animals in the water cycle?

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.

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