Question

how does a microscope magnify? a microscope makes things look bigger. it does this because light coming from the object passes through lenses. a lens is a piece of glass that has been carefully shaped to bend light. light that passes from an object through the lens of a microscope is bent so that the object looks larger. figure b shows the three lenses of a compound microscope. the top lens is called the eyepiece or the ocular lens. it is the lens closest to the eye. the other two lenses are the objective lenses. the objective lenses are the lenses closest to the object being viewed. the object being viewed is on a microscope slide. the slide is placed below the objective lenses on the microscope stage. different lenses magnify different powers. the power of magnification is marked by a number with an × next to it. a lens that magnifies ten times is marked 10×. in this picture, the ocular lens is marked 10× and the objective lens is marked 10×. this gives a total magnification of 100×. to find the total magnification of a microscope, just multiply the two magnifications. complete the table below by finding the total magnification for each pair of lenses. for example, the first pair has a total magnification of 100× (10×10 = 100).

eyepiece	objective lens	magnification
10×	40×
10×	44×
5×	10×
5×	40×
20×	10×
20×	40×

microscope slides
objects that are viewed with a microscope are placed on a small piece of glass called a microscope slide. a microscope slide is placed on the stage of a microscope below the objectives.
there are two kinds of microscope slides: temporary slides and permanent slides.

• a temporary slide cannot be stored. it is used once and then it is cleaned off. temporary slides are useful for studying tiny organisms while they are still living.
• a permanent slide can be stored and studied over and over again. only dead or nonliving things can be studied with a permanent slide.

most microscope slides are made of glass and are about 7.5 cm×2.5 cm (3\×1\). many times a cover slip is used on a slide. a cover slip is a very thin piece of glass or plastic, which rests on the glass slide.
figure f microscope slide and cover slip

1. what type of slide would you use to study organisms living in pond water while they are still alive?
2. why?
3. where does a microscope slide get placed on a microscope?
4. what are the advantages of temporary slides?
5. what are the advantages of permanent slides?

Explanation:

Step1: Recall microscope - slide types

Temporary slides are for living organisms and permanent for non - living.

Step2: Answer question 1

For living pond - water organisms, use temporary slides.

Step3: Answer question 2

Temporary slides are used for living organisms as they are used once and cleaned, not harming the living things.

Step4: Answer question 3

Microscope slides are placed on the stage of a microscope below the objectives.

Step5: Answer question 4

The advantage of temporary slides is they can be used to study living organisms.

Step6: Answer question 5

The advantage of permanent slides is they can be stored and studied multiple times.

Answer:

1. Temporary slide
2. Because they are used once and then cleaned off, suitable for studying living organisms without harming them.
3. On the stage of a microscope below the objectives.
4. They can be used to study living organisms.
5. They can be stored and studied over and over again.