Biological Concepts Laboratory Review 2 1. 19 mm equals how many cm? -2. 880 mm
ID: 188633 • Letter: B
Question
Biological Concepts Laboratory Review 2 1. 19 mm equals how many cm? -2. 880 mm equals how many m? 3. 2,.700 mg equals how many grams? 4.3.4 1 equals how many ml? 5. To properly measare 20 ml of water, what must be at the 20 ml mark of the graduated cylinder? 6. 90F equals how many degrees Celsius? 7, what kind of microscope would be used to study a whole or opaque object? 8. What is the name for the lenses located near the eye? 9. If the total magnification of a slide is 400x and the ocular lenses are 10x, what is the magnifying power of the objective being used? 10. If the amount of light passing through the condenser needs to be decreased, what microscope part should be adjusted? I1. What word describes a microscope that remains in focus when the objective lenses are changed? 12. If a slide is being viewed with the high-power objective, which adjustment knob should be used to sharpen the focus? 13. Which objective should be in place when the microscope is put away? 14. If threads are layered from top to bottom, brown, green, red, which layer will come into focus first if you are using the microscope properly? Thought Questions 1S. Which type of microscope should be used to view a virus that is 50 nm in size? Justify your choice 16. Justify your choice of an objective to use when starting your observation of the Euglena wet mount: if the Euglena are swimming to the left, which way shoald you move your slide to keep the organism in view? 17. If you use the coarse-adjustment knob to focus on an object with the high-power objective, what problems will you encounter? Explain.Explanation / Answer
1) 1mm = 0.1cm, then 19mm = 19x0.1 = 1.9cm.
2) 1mm = 0.001m, then 880mm = 880x 0.001m = 0.88m.
3) 1mg = 0.001 grams, then 2700mg = 2700 x 0.001 gram = 2.7grams.
4) 1L = 1000ml, then 3.4L = 3.4 x 1000 ml = 3400ml.
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