Science

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Author:
valerie_hsu
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22952
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Science
Updated:
2010-06-19 15:48:16
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80 multiple choice 10 short answers 2 essay questions
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  1. What are the six characteristics of living things?
    • life span
    • reproduce, repairm and grow
    • multi celled
    • respond to their environment
    • require energy
    • produce waste
  2. The _________ is the control centre.
    Nucleus
  3. The _________ holds the contents of the cell in place and acts as a gatekeeper.
    Cell Membrane
  4. Most of the cell is ___________, a water fluid that contains everything inside the cell membrane and outside the nucleus.
    Cytoplasm
  5. ________ are food factories of the plant cell. They contain molecules of a green chemical.
    Chloroplasts
  6. Cells live with other cells in like groups called ________.
    Tissue
  7. How big is the average cell?
    Three-hundredths of a millimeter wide
  8. Where are cells located in your body?
    In the whole body
  9. How many cells are there in your body?
    Between 50 and 100 trillion
  10. Which one of these actions is not performed by animal cells?
    Energy Production
  11. The microscopes in the science lab have a maximum magnification of _________.
    40x
  12. The transmission electron microscope uses __________ to reflect off of a specimen allowing for a digital three-dimensional umage to be created.
    Electrons
  13. Some of the best early microscopes were made by ___________________in the 1930s.
    Anton van Leeuwenhoek
  14. Light microscopes can magnify up to ______________ and allow us to see the different organelles inside the cell.
    2 000 000x
  15. The addition of the second lens in the compound light microscope allowed images to be viewed ______________ larger.
    1 000 000x
  16. ____________ occurs when molecules move from an area of low concentration to an area of high concentration.
    Diffusion
  17. What helps the cell move?
    Cilia (Tiny Hairs)
  18. What helps the flagellum move?
    Whip-like Tail
  19. What are two main ideas in the modern cell theory?
    • 1.All cells arise from already existing cells.
    • 2.All organisms are made of one or more cells.
  20. List the microscopes that were made first to last.
    • 1. Single-lens Microscope
    • 2. Compound Light Microscope
    • 3. Transmission Electron Microscope
    • 4. Scanning Electron Microscope
  21. Groups of organs that have related functions are?
    Organ System
  22. Organisms that are only visible under a microsccope.
    Micro-organisms
  23. Unicellular organisms that are neither plants nor animals.
    Protists
  24. "False Foot"
    Pseudopod
  25. Made of the strand or protein and cell fragments that remain after invaders have been attacked by white blood cells.
    Pus
  26. Organisms that are among the most primitive and also most plentiful on earth.
    Bacteria
  27. Invading cells all have distinctive molecules call _________ on their cell membranes or protein coats, which antibodies can attach to.
    Markers
  28. _______ are found in both fresh and salt water.
    Diatoms

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