The two words that best describe me? Solid gold. In fact, I'm made up of a single element. I existed as shiny flakes on other rocks, but was eroded by wind and water. Because I was so heavy, I sank to the bottom of a stream. Then people scooped me up and melted me into a big old block of gold.​

law of conservation of matter

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?