Section 1 - Tools of Science and Lab SafetyPresentation Transcript
Scientific Equipment and Safety Biology I Factoids
A graduated cylinder is used to measure volume accurately.
The meniscus is the curve at the surface of the liquid.
The meniscus is read from the center of the meniscus.
Other pieces of equipment used for measurement are the pipette, the burette, and the syringe.
Test tubes, beakers, and Erlenmeyer flasks are used for storing liquids – not for measuring.
The standard unit of mass is the gram. Mass is the measure of the amount of matter in an object. To measure mass, you typically use a triple beam balance.
The standard unit of length is the meter. Typically meter sticks are used to measure length.
The standard unit of temperature is degree Celsius. The temperature of something refers to how fast the molecules are moving.
The instrument used to see small objects is the compound light microscopes. These are the common microscopes found in the lab.
The electron microscope has greater resolution than a light microscope. You can not view living things using a light microscope.
Parts of the microscope include the arm, the base, the ocular lens, stage, stage clips, fine adjustment knobs, course adjustment knobs, light source, diaphragm, high power objective, low power objective, nosepiece, and body tube.
Total magnification is calculated by multiplying the object lens by the occular lens.
The field of view is what you can when looking through the eye piece.
As you increase magnification, the field of view decreases.
The diaphragm controls the amount of light entering the microscope.
A Bunsen Burner uses gas to produce a flame.
Test tubes should be pointed away from people when being heated.
Do not heat a capped test tube.
Hot plates do not use open flames but are used to heat liquids.
To pick up a heated test tube, you’d use a test tube clamp.
To pick up a heated beaker, you’d use beaker tongs or heat/asbestos gloves.
Treat all glassware as hot because hot glassware looks just like cold glassware.
Safety equipment includes the emergency eyewash station, safety shower, absorbent material to clean up spills, a biohazard container, broken glass container, fire extinguisher, goggles, gloves, and aprons.
Some of the common safety symbols include: biohazard, corrosive, flammable/combustible, no food or drink, poisonoous/toxic, and radiation.