Match the following words with their meaning. 1 . typhus fever rickettsia prawazekii 2 . lyme disease escherichia coli 3 . diarrhea streptococcus pyogenes 4 . staph infections mycobacterium tuberculosis 5 . strep throat borrelia burgdorferi 6 . tuberculosis staphylococcus aureus

1 . Typhus fever---Rickettsia prawazekii

2 . Lyme disease---Borrelia burgdorferi

3 . diarrhea Escherichia coli

4 . staph infections ---Staphylococcus aureus

5 . strep throat---Streptococcus pyogenes

6 . tuberculosis ---Mycobacterium tuberculosis

Explanation: micro organisms are the causative agents of disease.

Although some microorganisms are important in the everyday life of humans .some cause disease.

These microorganisms get into the body through food and water or through contact with infected humans.when they get into they body ,they multiply and affect the normal functioning of the body system.

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b. the carbon cycle ensures living things have a source of hydrogen