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Cells
What living things are made of, what is inside a plant and an animal cell, and how to measure cells with a microscope. Three ages, each with a text, an experiment, a game, a quiz, a printable worksheet and a teacher sheet.
Ages 6–7Cells: the tiny building blocks of lifeEvery living thing is made of tiny cells. What is inside them, how plant and animal cells differ, and how you grow. With a cell-in-a-bag model.Ages 10–11Inside a cell: plant and animal cellsCell theory, how small cells are, the parts of plant and animal cells, and bacteria. With an onion-skin microscope experiment.Ages 15–16Cells: size, magnification and surface areaProkaryotic and eukaryotic cells, magnification and resolution, surface-area-to-volume ratio, and estimating the size of onion cells from the field of view.