Using a Microscope

What knob must be turned first for the initial focusing of the sample?

• fine adjustment knob

• light intensity knob

• coarse adjustment knob

• base knob

Which of the following is correct as you move the microscope from one place to another?

• Hold the handle and the base.

• Hold the eyepiece and the body tube.

• Hold the objective lenses and the base.

• Hold the nosepiece and the condenser.

For the proper position of the microscope, the handle must be pointing in what direction?

• away from the user

• towards the user

• pointing to the right

• pointing to the left

How could you know that the objective lens that you will be using is in the proper position for focusing?

• You must see the lens aligned with the stage.

• You must position the lens 90 degrees away

• You must hear a “click” while turning the lens.

• You must see the lens glowing.

When you focus on a new specimen, always begin with

• low power and coarse adjustment.

• low power and fine adjustment

• high power and coarse adjustment

• high power and fine adjustment

When using a microscope, you focus on a new specimen by always beginning with

• low power and coarse adjustment.

• low power and fine adjustment

• high power and coarse adjustment

• high power and fine adjustment

When carrying the microscope to your lab station, you should hold the microscope by the ​_____.

• arm and base

• body tube only

• base only

• body tube and base

When carrying a microscope, place one hand on the ________ and one on the _________.

• focus knob

• arm

• stage

• base

Always use the ​ (a)   power objective first to focus the image.

• lowest

• medium

• highest

Why do you need to adjust the iris diaphragm and condenser to control light intensity in the microscope?

• Too much light creates too much bright field under the microscope.

• Too much light makes the clearer image of the sample.

• Too much light gives color to the image of the sample.

• Too much light magnifies the image of the sample.

Tags

NGSS.MS-PS4-1