Laboratory Safety and Equipment Familiarization Flashcards
Give safety rules in the laboratory
- NEVER work alone in the laboratory. Work in the lab only while under the supervision of your teacher. Do not leave equipment unattended while it is in operation.
- Read the entire experiment before entering the lab. Take the necessary precautions in performing the experiment. If in doubt, you can ask your teacher about it.
- Familiarize yourself with safety symbols and cautions posted in the laboratory room.
- Report all accidents to the teacher immediately, no matter how minor. In addition, if you get a headache, feel sick to your stomach, or feel dizzy, tell your teacher immediately.
- DO NOT perform unauthorized experiments or use materials and equipment in a manner for which they were not intended. 6. Experiments performed in the laboratory class must be approved by the teacher. Steps in a procedure should only be performed as described in the textbook or lab manual or approved by your teacher.
- Never play in the lab or use lab time or equipment for anything other than their intended purpose. Be cautious in using laboratory equipment and apparatus.
- Food, beverages, and chewing gum are NEVER permitted in the laboratory.
- Exercise caution when working with electrical equipment. Do not use electrical equipment with frayed or twisted wires. Be sure your hands are dry before using electrical equipment.
- Keep your working areas and apparatus clean and neat.
laboratory apparatus/equipment/device are categorized according to
electrical equipment,
magnetic equipment
optical equipment
gravity related equipment
waves and sound related equipment,
heat and thermodynamics equipment,
kinetics related equipment measuring equipment
measuring equipment includes (6)
meter scale
vernier caliper
micrometer
stop watch
analytical balance
triple beam balance
most common measuring tool that we use in a day to day activity. Often know as a rule
meter scale
what is a meter scale
measuring tool that has equally spaced markings along its length to measure distances along the straight lines
one of the most widely used measuring instruments after the measuring scale
vernier caliper
use of vernier caliper
allows users to measure distances with far greater degree of accuracy than a measuring scale
works on simple principle of converting distances into larger ones by measuring the rotation of the screw
micrometer
what is a micrometer
utilizes a “screw” principle to read smaller distances on a scale after amplifying them
label the vernier caliper parts
+1
label micrometer parts
+1
is a clock designed to measure the amount of time elapsed from a particular time when it is activated to the time when the piece is deactivated
stop clock
use of stop clock/stop watch
used to measure time in experiments (like in pendulum based experiments) where brief period of time measurements is needed to do calculations
provides greater accuracy than spring scale in determining mass of objects in grams
triple beam balance
use of triple beam balance
determine the mass of objects in grams in great accuracy
most precise mass measuring tool because of its readability measuring to the nearest 0.0001g
analytical balance
analytical balance use
determine the mass of small samples with a high degree of accuracy and precision.
used to determine the young’s modulus (Y) of a material of a wire
Searle’s apparatus
Searle’s apparatus use
used for the measurement of Young’s modulus. It consists of two equal-length wires that are attached to a rigid support
kinematics related equipment (3)
Searle’s apparatus
spring balances
spring constant apparatus
are commonly used to measure the force exerted on an object.
Spring balances
force measured in spring balacnes are measured in what unit
newtons
weight of an object formula
w = mg
Label Searle’s apparatus
+1
use of Spring balance
used to measure the force exerted on an object
used to measure force by using Hook’s law
Spring Constant Apparatus
use of Spring Constant apparatus
measure force by using Hook’s law
heat and thermodynamics related equipment (2)
thermometer
calorimeter
is an instrument that measures temperature
thermometer
use of thermometer
measure temperature
is used to measure the heat of chemical reactions or physical changes as well as heat capacity
calorimeter
calorimeter use
measure the heat of chemical reactions or physical changes as well as heat capacity
two-pronged fork with the prongs (tines) forming a U-shaped bar of elastic metal
tuning fork
use of tuning fork
resonates at a specific constant pitch when striked on a surface
used for demonstrating longitudinal and transverse motion
wave motion apparatus
wave motion apparatus use
to demonstrate fundamental wave properties, including wavelength, amplitude, frequency, and wave speed.
device used for measuring the relationship between the frequency of the sound produced by a plucked string and the tension, length, and mass per unit length of string
sonometer
use of sonometer
to measure sound waves. The device is used to show the connection between the tension, length, and mass per unit length of the string and the frequency of the sound it makes when it is pulled.
wave and sound related equipment (3)
wave motion apparatus
sonometer
tuning fork
optical equipment (2)
optical benches
prism
observe the image formation
optical benches