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Monday, June 3, 2013

LAB #14 – Using a Microscope

microscope is an instrument to see objects too small for the naked eye. The science of investigating small objects using such an instrument is called microscopyMicroscopic means invisible to the eye unless aided by a microscope.  There are many types of microscopes, the most common and first to be invented is the optical microscope which uses light to image the sample.

Problem

      How can we tell the difference between salt and sugar?


Hypothesis




Materials
Microscope
Salt
Sugar
Celery leaves
Various slides
  
Procedure

1.             Make observations of salt and sugar at different degrees of magnification. 
2.             Make observations of celery leaves at different degrees of magnification.
3.                                 Make observations of various slides at different degrees of magnification.

Results


Observations with no magnification

Salt

Sugar





Observations at 40X magnification

Salt

Sugar





Observations at 100X magnification

Salt

Sugar





Observations with no magnification

Celery leaves
 Human hair
fingernail





Observations of various objects with 40X magnification


Celery leaves
Human hair
fingernail







Observations of various objects at 100 X magnification


Celery leaves










Observations of various objects at 100X magnification


Celery leaves








 Analysis

1.         How did the microscope assist you in visualizing the various objects?

2.         Why does the microscope stage have a hole in it?

3.         Which parts of the microscope enlarge the image of the specimen?

4.         If the specimen appears blurry, what should you do first?

5.         Describe the correct way to carry a microscope.
    
 Conclusion














1. Label the following parts of the microscope:
1.          Eyepiece lens
2.          Coarse Focus
3.          Fine Focus
4.          Objective lens
5.          Arm
6.          Stage
7.          Base



**BONUS POINTS**

**BONUS POINTS**

`1. Go check out this website and play 1 game for 1 point, 2 games for 2 points or 3 games for 3 points that will be added to your next Test score.  Write a brief summary of each game played in your notebook.
http://powermylearning.com/directory/science/biology
Grade Level 6-8

2.  Take the C8S1 Review Quiz.  Write the answers in your Notebook or copy/paste them into an email/engrade.
http://glencoe.mcgraw-hill.com/sites/0078771285/student_view0/unit3/chapter8/section1/section_quizzes_-_english.html

3. How many pairs in how many tries?
 http://glencoe.mcgraw-hill.com/sites/0078771285/student_view0/unit3/chapter8/interactive_tutor.html

4. Take the Chapter 8: Life's Structure and Classification review quiz for extra credit!

http://glencoe.mcgraw-hill.com/sites/0078771285/student_view0/unit3/chapter8/chapter_review_quiz_-_english.html