1) What could you do to get a clear image? a) Adjust the focus knob b) Make the light dimmer c) Put water on the slide 2) Name part A a) eyepiece lens b) focusing wheel c) objective lens d) stage 3) Name part B a) eyepiece lens b) focusing wheel c) objective lens d) stage 4) What is the function of part B? a) To direct light into the viewer's eye b) To magnify the image of a sample c) To support the micrscope d) To adjust the focus of the microscope 5) Name part C a) stage b) focusing wheel c) eyepiece lens d) objective lens 6) What is the function of part B? a) To direct light into the viewer's eye b) To magnify the image of a sample c) To support the micrscope d) To adjust the focus of the microscope 7) What is the function of part A? a) To direct light into the viewer's eye b) To magnify the image of a sample c) To support the microscope d) To adjust the focus of the microscope 8) Why do we add a stain (e.g. iodine solution) to our sample? a) To help see individual cells b) To prevent air bubbles c) To stain parts of a cell 9) Why do we use a thin sample? a) To help see individual cells b) To prevent air bubbles c) To stain parts of a cell 10) Why do we lower the coverslip at an angle? a) To help see individual cells b) To prevent air bubbles c) To stain parts of a cell 11) What two improvements could the student make to the drawing? a) Add colour to the cells b) Complete the cell walls c) Draw each cell on a separate piece of paper d) Include the magnification e) Use a ruler to draw the cells 12) What is one hazard when preparing a slide of onion cells? a) Call a first aider b) Cut the onion on a chopping board c) The onion is cut into pieces d) The knife is sharp 13) What is one way to minimize the risk when preparing a slide of onion cells? a) Call a first aider b) Cut the onion on a chopping board c) The onion is cut into pieces d) The knife is sharp 14) Which objective lens is the easiest to focus with and therefore the one we use first? a) Low power b) High power

Light microscopes

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