Zinc sulfide can be made by heating a mixture of zinc and sulfur. The properties of each substance in this process are shown in the table. ​
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Based on the information in the table, select the correct answer from each drop-down menu to complete the paragraph.

When a mixture of zinc and sulfur is heated, a chemical reaction This is supported by the data in the table showing that During this process, the zinc and sulfur atoms

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.