10. What is accomplished by turning the coarse adjustment upwards/downwards?

1. Facilitates the changing of objectives.

II. Focuses or brings out the object to be observed.

III. Facilitates the changing of eyepiece. IV. Connects the eyepieces to the revolving nosepiece with the objectives.

A. 1 & II only

B. II & III only

C. I, II, & III only

D. I, II, III & IV

11. Why do you have to watch from the side when changing objectives?

I. Objectives are of different lengths.

11. The HPO is longer and can easily crash into the cover slip and slide.

III. It allows one to tilt the microscope, so viewing is possible while seated. IV. This is done to prevent accidental crashing of the objectives into the slide. and breakage of lens, slide, or cover slip.

A. I & II only

B. I & III only.

C. I, II and IV only

D. II & III only

12. The magnification of a microscope is equal to

A. the magnification power of the objective lens divided by that of the ocular lens..

B. the magnification power of the objective lens divided by the numerical aperture.

objective lenses.

numerical aperture.

C. the product of magnification produced individually by the ocular and D. the product of magnification produced individually by the ocular and

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CO Q2 Science7_ Modulel

an image?

13. A plant cell is viewed using a 10x eyepiece and 43x HPO, How much will the cell be

magnified?

A. 10x

B. 43x

C. 143x

D. 430x

14. How does a mirror help in studying the specimen in a microscope?

A. It cleans the cover slip.

B. It cleans the glass slide.

C. It gives light directly to the eyes of the user.

D. It reflects light to illuminate the specimen.

15. Why is it necessary for the specimen to be observed under the microscope must be thin?

A. So that the image will be clearer. B. So that the image would be larger.

C. So that light could pass through the specimen.

D. So that the high magnification objective can be used.​