Download - 1.2 Laboratory Rules
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1.2 SCIENCELABORATORY
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Laboratory Safety Rules And
Precautions´ You should only enter a science laboratory withyour teachers permission.
´ You must not bring food and drinks into the
science laboratory.´ You are not allowed to enter the preparation
rooms and stores.
´
You must not take out apparatus and chemicalsfrom the laboratory.
´ You should only use apparatus and chemicalswith the teachers permission.
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´ All the apparatus and chemicals must only be
used for the purpose instructed by the teacher.´ Materials must be handled correctly, for example
bottles should not be carried by the neck.
´ You must not taste any chemicals unless your
teacher instructs you to do so.
´ You must always check the label on the bottle tomake sure that you are using the correct
chemicals.´ Should a chemical come into contact with your
skin or clothing, wash thoroughly with water.
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´ Should a chemical accidently come into contact
with your mouth, you should spit it out and washyour mouth with plenty of water.
´ You must report all the accidents and injuries
such as cuts and burns to your teacher immediately.
´ You should not play in the laboratory.
´
You should not play with apparatus andchemicals.
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LABORATORYAPPARATUS
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´ Click on the 6 apparatus that you think can be found
in a science lab.
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COMMON LABORATORY APPARATUS
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BEAKER
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L ABORATORY APPARATUS
APPARATUS USES
Bunsen burner -The Bunsen burner is mainly used for heating things.
-During a heating process, avoid from direct contact with
heated apparatus.
Beaker The following is a list of the uses of a beaker: -- A beaker is an apparatus used as a container for liquids.
- A beaker is used to transfer liquids to another apparatus.
-The beak-shaped mouth of a beaker helps to avoid spilling.
-A beaker is used as a simple measuring tool.
-A beaker is used as a container for small objects and
materials.-A beaker is used in heating experiments and activities.
-A beaker is made from glass. Be careful when handling it.
When using a beaker, avoid breaking and overheating a glass
beaker.
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USING A BUNSEN BURNER ( page 10 )
Use a lighter or match to light up a
Bunsen burner. Remember to light up the
match before you turn on the gas.
Use a test tube holder when heating
solutions in a test tube. Do not point the
mouth of the test tube to yourself or your
friends.
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USING A BUNSEN BURNER ( page 10)
Use a tripod stand and wire gauze when
heating chemicals in a beaker or crucible.
Do not heat flammable substances like
alcohol directly. Use a water bath instead.
Turn off the gas after using a Bunsen
burner.
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USES OF BUNSEN BURNER
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H AZARDS SYMBOL ( page 11)
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EXERCISE: ( page 12 )
1)What apparatus will you use to:
a. Find the volume of liquid in a bottle:
b. Heat things in a science laboratory
c. Measure the temperature of boiling water
d. Measure the time taken for a pupil to run 400 meters
2)Explain why you cannot throw unwanted things into a sink
3)List three good practices in a science laboratory
4)List three bad practices in a science laboratory
5)Draw the apparatus in Figure 1 in outline. What are their uses?