MICROSCOPES AND CELLS

WHAT IS A CELL? A CELL IS THE BASIC BUILDING

BLOCK OF LIFE. IT CARRIES ALL OF OUR GENETIC

INFORMATION. WE HAVE TRILLIONS OF CELLS IN

OUR BODIES.

WHAT IS CELL THEORY? ALL LIVING THINGS ARE COMPOSED

OF CELLS. CELLS ARE THE BASIC UNIT AND

STRUCTURE OF ALL LIVING THINGS. ALL CELLS ARE PRODUCED FROM

OTHER CELLS.

MICROSCOPES A MICROSCOPE IS ANY DEVICE USED

TO MAKE SMALL OBJECTS SEEM LARGER.

A COMPOUND MICROSCOPE IS ANY LIGHT MICROSCOPE THAT HAS MORE THAN ONE LENS.

EARLY MICROSCOPES AND SCIENTISTS

ROBERT HOOKEANTON VAN LEEUWENHOEK

IMPROVED ON THE COMPOUND MICROSCOPE.

ONE OF THE FIRST PEOPLE TO OBSERVE CELLS.

CREATED A SIMPLE MICROSCOPE.

OBSERVED MANY ONE-CELLED ORGANISMS.

HOW DOES A MICROSCOPE WORK?

MICROSCOPES MAGNIFY OBJECTS BY BENDING THE LIGHT THAT PASSES THROUGH THEIR LENSES.

BENT LENSES ARE CALLED CONVEX LENSES.

SOMETIMES MICROSCOPES NEED TO BE ADJUSTED FOR SHARPER RESOLUTION.

PARTS OF A MICROSCOPE 1. EYE PIECE: THIS IS WHAT YOU LOOK

THROUGH INTO THE MICROSCOPE. 2. ARM: USE ONE HAND TO HOLD THIS

PART OF THE MICROSCOPE WHEN MOVING IT.

3. FINE ADJUSTMENT: THIS MOVES YOUR SPECIMEN UP AND DOWN BUT JUST A TINY BIT.

4. COURSE ADJUSTMENT: THIS MOVES YOUR SPECIMEN UP AND DOWN A LOT.

PARTS OF A MICROSCOPE 5. OBJECTIVE LENS: THESE ARE WHAT

MAGNIFY YOUR SPECIMENS. THERE ARE THREE ON OUR MICROSCOPES. THEY CAN MAGNIFY 40X, 100X AND 400X.

6. STAGE: THIS IS WHERE YOUR SPECIMEN SITS.

7. DIAPHRAGM: THIS ALLOWS LIGHT TO PASS THROUGH.

8. LIGHT: ILLUMINATES YOUR SPECIMEN.

PARTS OF A MICROSCOPE 9. BASE: USE YOUR OTHER HAND TO

HOLD THIS WHEN MOVING A MICROSCOPE.

10. STAGE CLIPS: THESE HOLD YOUR SPECIMEN IN PLACE.

SLIDES AND COVERSA. SLIDE B. SLIDE COVER

MADE OF GLASS.

THIS IS WHERE YOU PLACE YOUR SPECIMEN.

MADE OF PLASTIC

YOU COVER YOUR SPECIMEN WITH THIS.

HAND LENSC. CASE D. LENS

WHERE THE LENSES REST WHEN CLOSED.

WHERE YOU HOLD WHEN USING THE HANDLENS.

MAGNIFIES OBJECTS.

HOW TO MAKE A DRY SLIDE

DRY SLIDES HAVE DRY SPECIMENS. PLACE YOUR SPECIMEN ON YOUR

SLIDE AND COVER WITH A SLIDE COVER.

HOW TO MAKE A WET SLIDE

PLACE SPECIMEN ONTO SLIDE WITH DROPPER.

PLACE ONE DROP OF BLEACH OR DYE SOLUTION (OR BOTH OR NONE) ONTO SPECIMEN.

COVER WITH SLIDE COVER.

HOW TO USE A MICROSCOPE PLUG IN. TURN ON. PLACE SLIDE UNDER SLIDE CLIPS. CHOOSE YOUR OBJECTIVE LENS

MAGNIFICATION. ADJUST COSRSE ADJUSTMENT UNTIL

YOU CAN SEE YOUR SPECIMEN. ADJUST FINE ADJUSTMENT UNTIL YOU

CAN SEE YOUR SPECIMEN VERY CLEARLY.

ARE THERE ANY QUESTIONS