Allen read that the gas company was burying sheets of magnesium next to pipelines to prevent rusting. He decided to investigate the effectiveness of various metals in preventing rusting. He placed the following
into three separate test tubes of water: A) Iron nail B) Iron nail wrapped with aluminum strip C) Iron nail
wrapped with magnesium strip. He used the same amount of water, equal amounts of the metals and the
same size iron nails. At the end of five days he recorded the amount of rusting on the nails and the color of
the water.

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle