Science Vocabulary-Lessons 1-4- Chapter 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Cells | forms the parts of an organism and carries out all of its functions
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| Microscope | is an instrument that makes small objects look larger
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| Cell Theory | is a widely accepted explanation of the relationship of cells and living things
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| Cell Wall | is a rigid layer that surrounds the cells of plants and some other organisms
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| Cell Membrane | controls which substances pass into and out of a cell
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| Nucleus | acts as a cell's control center, directing all of the cells activities
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| Organelles | carries out specific functions within a cell
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| Ribosomes | are small grain-shaped organelles that produce proteins
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| Mitochondria | converts energy stored in food to energy the cell can use to live and function
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| Endoplasmic Reticulum | often called the ER, is and organelle with a network of membranes that produces many substances
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| Golgi Apparatus | receives proteins and other newly formed materials from the ER, packages them, and distributes them to form other parts of the cell or to the outside of the cell
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| Vacuole | stores water, food, or other materials needed by the cell
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| Chloroplast | captures energy from sunlight and changes it to a form of energy cells can use in making food
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| Lysosomes | contains substances that break down large food particles into smaller ones
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| Multicellular | made of many cells
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| Unicellular | single-celled organisms
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| Tissue | is a group of similar cells that work together to perform a specific function
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| Organ | is made of different kinds of tissues that function together
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| Organ System | is a group of organs that work together to perform a major function
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| Elements | any substance that cannot be broken down into smaller substances
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| Compounds | form when two or more elements combine chemically
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| Carbohydrates | energy- rich organic compounds made of the elements carbon, hydrogen, and oxygen
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| Lipids | are compounds that are mostly made of carbon and hydrogen and some oxygen
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| Proteins | are large organic molecules made of carbon, hydrogen, oxygen, and, in some cases, sulfur
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| Enzymes | speed up chemical reactions in living things
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| Nucleic Acids | are very long organic molecules
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| DNA | is the genetic material that carries information about an organism and is passed from parent to offspring
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| Double Helix | the shape of a DNA molecule
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| Selectively Permeable | that some substances can cross the membrane while others cannot
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| Passive Transport | the movement of dissolved materials across a cell membrane without using the cell's energy
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| Osmosis | is the diffusion of water molecules across a selectively permeable membrane
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| Diffusion | is the process by which molecules move from an area of higher concentration to an area of lower concentration
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| Active Transport | is the movement of materials across a cell membrane using cellular energy
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| Endocytosis | the cell membrane changes shape and engulfs the particle
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| Exocytosis | allows large particles to leave a cell
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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