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SAFETY IN THE LAB

SAFETY IN THE LAB. 1.Stay in your place. Never run or play in the laboratory. 2.Don’t remove anything from the laboratory without your teacher's permission. 3. Follow strictly the instructions, especially when you use chemicals, fire, glass instruments or microscopes.

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SAFETY IN THE LAB

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  1. SAFETY IN THE LAB

  2. 1.Stay in your place. Never run or play in the laboratory.

  3. 2.Don’t remove anything from the laboratory without your teacher's permission.

  4. 3. Follow strictly the instructions, especially when you use chemicals, fire, glass instruments or microscopes.

  5. 4. Put on the laboratory table just the material for the experience and your notebook.

  6. 5. Draw and write carefully the results.

  7. 6. When you finish your experience, everything must be clean and tidy.

  8. STEREO MICROSCOPE: LUPA BINOCULAR

  9. PARTS OF THE STEREO MICROSCOPE • Eyepiece lens • Adjustment knob (focuss) • Stage • Light source • Base

  10. STEREOMICROSCOPE AND COMPOUND MICROSCOPE WHAT DIFFERENCES CAN YOU SEE?

  11. STEREO MICROSCOPE AND MICROSCOPE • Always two eyepiece. • No objectives. • Stage on the base. • Light doesn’t pass through the sample. • Observe in 3D. • Larger objects. • Low magnification, 7-30 x • One or two eyepiece. • 3-4 objectives. • Stage in the middle. • Light pass through the sample. • Images in 2D. • Very thin slides. • Magnification, 30-500x

  12. Draw and label everything you observe. Make drawings clear and large.

  13. Todayyou are observing: Little bugsfrom “cornicabra”. Ferns . Look at theclusters of sporesbehindtheleaves. Mosses. Look a theverylittleleaves and at the capsules withthespores. Liverworts. Themost simple landvegetals. They are in betweenalgae and mosses. Draw and label everything you observe. Make drawings clear and large.

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