The Microscope

The distance between the objective lens and the specimen is called the ___________ distance. a. working b. viewing c. objective d. functional

a

To move a specimen to the upper left-hand field of view, which way must one move the slide? a. move the slide to the lower right b. move the slide to the upper left c. move the slide to the upper right d. move the slide to the lower left

a

When reading a graduated cylinder that has liquid in it, you should read the meniscus, which is the _______ of the curve. a. top b. middle c. side d. bottom

a

If you change from the low-power objective to the high-power objective, what happens to the depth of the field? a. increased b. decreases c. no change d. completely lost

b

What is the approximate magnification of the low-power objective? a. 5x b. 10x c. 45X d. 95x

b

What should you do if you want to change the objective? a. grasp the desired objective and pull it into place b. turn the nosepiece c. turn the fine-adjustment knob d. move the slide under the desired objective

b

While looking at a specimen under a compound microscope, you move the slide to the right. In which direction does the image move? a. to the right b. to the left c. up d. down

b

You are looking at a specimen through a high-power objective with a magnification of 45x, and the ocular has a magnification of 10x. What is the total magnification? a. 45x b. 450x c. 4500x d. 45000x

b

You are looking at the specimen under low power, and you switch to the high-power objective. Which of the following happens? a. the magnification decreases b. the resolution increases c. the amount of light decreases d. you can no longer see the specimen

b

_________ is a statement of the anticipated answer to the question. a. prediction b. hypothesis c. dependent variable d. independent variable

b

convert "3.9 m" to cm a. 39 cm b. 390 cm c. 3900 cm d. 39000 cm

b

If a beaker weighs 115,000 mg, what is its weight in g? a. .0115 b. .115 c. 115 d. 11500

c

Which of the following microscope objectives is used for final and fine focusing? a. scanning b. low-power c. high-power d. oil-immersion

c

Why is a control group important in an experiment? a. in provides ample data to be collected b. it provides the group that is being manipulated c. it provides the basis for assessing the effect of the independent variable d. it provides a hypothesis

c

You place a translucent ruler under your microscope at low power, and the field of view measures 7 millimeters. What is the diameter of the field of view for the low-power objective? a. 70 micrometers b. 700 micrometers c. 7000 micrometers d. 70000 micrometers

c

Convert "22.4 L" to ml a. .224 ml b. 2240 ml c. 22400 ml d. 224000 ml

d

The microscope platform upon which the specimen slides are placed is called the. a. shelf b. arm c. base d. stage

d

What happens to the field of view if you switch from the high-power objective to the low-power? a. disappears b. no change c. decreases d. increases

d

What would you do in order to view a fresh specimen under the microscope? a. place the specimen in a drop of oil b. place the objective directly into the specimen without a coverslip c. treat the specimen with heavy metal salts d. prepare a wet mount

d

When using the _________ objective, you would use the coarse-adjustment knob to bring the specimen to focus. a. oil-immersion b. high-power c. low-power d. scanning

d