Mattias scheiden and theodor schwann studied plant and aniaml cells under a microscope. together these men concluded that plants and aniamals are made up of cells, which scientist furthered their study to complete our mordern cell theory

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he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.