Year 9 Chemistry – Worksheet 1
1.1. Lab safety
Since we’ve been working in the lab for some weeks now it’s high time to get used to some standard lab safety rules. Remember: These are not supposed to be a nuisance, but to keep you safe!
Rule Correct behavior Incorrect behavior Reason
Always wear protective glasses while
experimenting!
When
experimenting with fire always tie long hair together and roll up wide sleeves.
Do not eat or drink in the lab.
Never try chemicals.
Never point the opening of a test tube towards a person.
Always work with small amounts of chemicals.
Task: Please make a drawing showing correct and incorrect behavior for each rule. Give reasons why this rule is important.
Year 9 Chemistry – Worksheet 1
Lab equipment
With a bulb you are able to show, if an electric circuit carries a current. If a connected buld lights up, a current is flowing. If not, there is no current.
The spatula is a kind of spoon, usually made out of metal. A spatula can be used to pick up small amounts of chemicals and mix them together.
The pipette is a little tube out of metal of plastic that can be used to pick up small amounts of liquid and release them drop by drop.
An evaporating dish is a small porcelain bowl. This can be used to light substances or heat them up, because the porcelain does not burn.
An Erlenmeyer flask is a glass container that gets slimmer towards the top. The flask was developed by Emil Erlenmeyer and is used to mix liquids for example.
The test tube is a thin, long piece of glassware. It is used in many labs and applications, e.g.
storing and analyzing small amounts of chemicals.
A separatory funnel is a long glass container, that can be used to separate liquids that do not mix.
A test tube clamp is made out of wood and looks similar to a clothespin. It is used to safely hold test tubes.
A beaker is a glass used to measure and mix. It has a volume scale and spout.
Tongs are made out of metal.
They are used to hold things into a flame without burning oneself.
Filters can come in different shapes and sizes. They are used to separate solids from liquids.
A test tube stand is made out of plastic or wood. The stand has holes to put test tubes in, to prevent them from falling over.
A pestle and mortar are made out of porcelain. They are used to grind up solid materials.
Graduated cylinders or measuring cylinders are made out of glass or plastic. They feature a very fine volume scale and are used to measure exact volumes of liquids.
A tripod and gauze mat are made of metal (the center of the mat is made of ceramics).
They used to suspend object above a burner to heat them up properly and distribute the heat evenly across the bottom.
A buret is made out of glass and a long thin tube with volume scale. It is used to very carefully and precisely dispense liquids by the drop.
The Bunsen burner is a gas burner. It is used to create very high temperatures and heat up substances.
Ring stands, couplings and clamps are all made of metal.
They are used when a larger experiment setup needs support so it won’t fall over.
1. Find the correct picture and description for each of your utensils.
2. Prepare a sheet on which you describe your utensil in your own words. Stick the appropriate picture onto the sheet.
3. Present your utensils to class.
