Biology - Measuring Organisms Under the Microscope Lab

[Jessica]

Name of object: Boletus
Measurement of Object: 250 micrometers
Measurement of the low-power field diameter: 4 mm or 4000 micrometers
Low-power magnification: 4X
High-power magnification: 40X

Questions
1. How many micrometers are in 1 mm? 1000 micrometers
2. How many micrometers are in 1 meter? 1 million micrometers
3. What happens to the field of view when you change from low-power magnification to high-power magnification? :?:
4. How many times is the magnification increased when you change from low-power to high-power magnification? :?:
5. How many times is the diameter of a field decreased when you change from low-power to high-power magnification? :?:


1. Approximately 500 of a certain type of bacteria can fit across your low-power field of vision. What is the approximate size of 1 bacterium? Approximately 8 micrometers
2. Approximately 7 of a certain type of protist can fit across your high-power field of vision. What is the approximate size of 1 protist? Approximately 571 micrometers
3. If a microscope has a low-power magnification of 100X, a high power of 600X, and a low-power field diameter of 1800 micrometers, what is the high-power field diameter in micrometers? :?:
4. If 20 objects fit across a low-power field of view whose field diameter is 3000 micrometers, what is the approximate size of each object? Approximately 150 micrometers

[Jessica]

People who are an expert in science/biology please help me.
come on why is no one helping me :sad: *cries*

[sosia]

Name of object: Boletus
Measurement of Object: 250 micrometers
Measurement of the low-power field diameter: 4 mm or 4000 micrometers
Low-power magnification: 4X
High-power magnification: 40X

4X implies I see the X object 4 times with more detail.

If I have a 4000 micrometer diameter when I'm lookin at 4X position (Low-power), when I see at the 40X position (High-Power), I see things 10 times bigger, so I see 10 times with more detail, so my 40X diameter is 400 micrometer (I see 1/10 of the original surface)
Remember: to see 10 times better is seen 1/10 of the original surface.
Remember googlemaps: Always when you ask for more detail you see less surface but in more detail.


Questions
1. How many micrometers are in 1 mm? 1000 micrometers :good:
2. How many micrometers are in 1 meter? 1 million micrometers :good:
3. What happens to the field of view when you change from low-power magnification to high-power magnification? :?: This is the main point. Be carefull!! It's a microscope. When you use "magnification", you're making things BIG, that is, you change from 4000 micrometers to 400 micrometres (you make thing 10 times bigger, that is, you see 1/10 of the original micrometers).
Answer: The field of view becomes 10 times bigger, that is I see 1/10 of the original surface, seeing the details.
4. How many times is the magnification increased when you change from low-power to high-power magnification? :?:10 times (from 4x to 40x)
5. How many times is the diameter of a field decreased when you change from low-power to high-power magnification? :?: 10 times (from 4000 micrometers to 400 micrometres )


1. Approximately 500 of a certain type of bacteria can fit across your low-power field of vision. What is the approximate size of 1 bacterium? Approximately 8 micrometers :good:
2. Approximately 7 of a certain type of protist can fit across your high-power field of vision. What is the approximate size of 1 protist? Approximately 571 micrometers :bad: High-power diameter: 400 micrometers. when 7 must fit, --> aprox 57 micrometers

3. If a microscope has a low-power magnification of 100X, a high power of 600X, and a low-power field diameter of 1800 micrometers, what is the high-power field diameter in micrometers? :?: high(600X) is 6 times bigger as low(100X) so if Low has 1800 micrometers, high is 1/6 --> 300 micrometers

4. If 20 objects fit across a low-power field of view whose field diameter is 3000 micrometers, what is the approximate size of each object? Approximately 150 micrometers:good:

Whe we say "fit" we are asuming they are all in the diameter, like balls in a necklace.

saludos :D

[Jessica]

thanks so much!!! you've really helped me!

[blue777]

Amigo, be careful with the unit used..:) (I'm reffering with "mm."). It's really confusing and still can't figure out what does it mean? Does "mm" stands for millimeter or micrometre? just check ur thread again. :) But still Good job! tnx again.

[brute]

Name of object: Boletus
Measurement of Object: 250 micrometers
Measurement of the low-power field diameter: 4 mm or 4000 micrometers
Low-power magnification: 4X
High-power magnification: 40X

Questions
1. How many micrometers are in 1 mm? 1000 micrometers :good:
2. How many micrometers are in 1 meter? 1 million micrometers:good:
3. What happens to the field of view when you change from low-power magnification to high-power magnification? drops by a factor of 10 to 400microns
4. How many times is the magnification increased when you change from low-power to high-power magnification? increases by a factor of 40/4
5. How many times is the diameter of a field decreased when you change from low-power to high-power magnification? !0 times


1. Approximately 500 of a certain type of bacteria can fit across your low-power field of vision. What is the approximate size of 1 bacterium? Approximately 8 micrometers :good:
2. Approximately 7 of a certain type of protist can fit across your high-power field of vision. What is the approximate size of 1 protist? Approximately 571 micrometers :good:
3. If a microscope has a low-power magnification of 100X, a high power of 600X, and a low-power field diameter of 1800 micrometers, what is the high-power field diameter in micrometers? 1800/6
4. If 20 objects fit across a low-power field of view whose field diameter is 3000 micrometers, what is the approximate size of each object? Approximately 150 micrometers :good:

If magnification increases by a factor N, then field diameter decreases by same factor. If mag is doubled, field diam is halved

[Jessica]

Amigo, be careful with the unit used..:) (I'm reffering with "mm."). It's really confusing and still can't figure out what does it mean? Does "mm" stands for millimeter or micrometre? just check ur thread again. :) But still Good job! tnx again.

millimeter. how does it stand for micrometer? :confused: we used a different abbrev., a symbol.

[Mary Ella]

how did you get eight micromaters and the micromater sign is um