The lesson today Today we are going to

The lesson today Today we are going to cover: • Safety in the lab • Science equipment- names and uses • Scientific readings and measurements

In science lab you must ALWAYS… • Follow the teachers instructions. • Know where the gas and electricity safety switches/ taps are. • Wear safety glasses and a laboratory coat/ apron, tie back long hair when mixing or heating substances. • Point test tubes away from your eyes and other people. • Push chairs in and keep walkways clear. • Inform your teacher if you break equipment, spill chemicals or cut, or burn yourself. • Wait until hot equipment has cooled before putting it away. • Clean your workspace- don’t leave equipment on the bench. • Dispose of waste as instructed by your teacher. • Wash your hand thoroughly after handling any substance in the laboratory.

In science lab you must NEVER… • • • Enter the laboratory without your teachers permission. Run or push in the laboratory. Eat or drink in the laboratory. Smell or taste chemicals unless your teacher says that it is okay. When you do smell substances, fan the odour to your nose with your hand. Leave an experiment unattended. Conduct your own experiments without the teacher’s approval. Put solid materials down the sink. Pour hazardous chemicals down the sink (check with your teacher). Put hot objects or broken glass in the bin.

Lab safety click view time

Lab equipment

Common lab equipment • Used to protect lab benches • Produces a single, open gas from damage. flame which is used for heating, sterilisation and combustion.

Common lab equipment Heat proof mat Bunsen Burner • Used to protect lab benches • Produces a single, open gas from damage. flame which is used for heating, sterilisation and combustion.

Common lab equipment • Supports containers placed over a bunsen burner while they are being heated. • Supports a gauze mat over a bunsen burner.

Common lab equipment Gauze mat • Supports containers placed over a bunsen burner while they are being heated. Tripod • Supports a gauze mat over a bunsen burner.

Common lab equipment • Small finger-length container to hold small amounts of substances while holding, heating or mixing is. • Holds the test tubes upright.

Common lab equipment Test tube • Small finger-length container to hold small amounts of substances while holding, heating or mixing is. Test tube rack • Holds the test tubes upright.

Common lab equipment • Used to hold a test tube while it is being heated. • Used to hold objects while they are being heated. Or to pick up hot glassware/ containers.

Common lab equipment Test tube holder • Used to hold a test tube while it is being heated. Tongs • Used to hold objects while they are being heated. Or to pick up hot glassware/ containers.

Common lab equipment • A funnel used with filter paper to separate solids from liquids. • Concave piece of glass used to hold solids.

Common lab equipment Filter funnel • A funnel used with filter paper to separate solids from liquids. Watch glass • Concave piece of glass used to hold solids.

Common lab equipment • Container used for mixing substances or collecting filtered substances. • Container used for stirring, mixing and heating substances.

Common lab equipment Conical flask • Container used for mixing substances or collecting filtered substances. Beaker • Container used for stirring, mixing and heating substances.

Common lab equipment • Used to measure temperatures! • Used to stir substances.

Common lab equipment Thermometer • Used to measure temperatures! Stirring rod • Used to stir substances.

Common lab equipment • Used to handle small amounts of solid substances. • ALWAYS worn to protect eyes from harmful substances or procedures.

Common lab equipment Spatula • Used to handle small amounts of solid substances. Safety glasses • ALWAYS worn to protect eyes from harmful substances or procedures.

Common lab equipment • Used to measure the volume of liquids. • Container used when heating small amounts of substances over a bunsen burner.

Common lab equipment Measuring cylinder • Used to measure the volume of liquids. Evaporating dish • Container used when heating small amounts of substances over a bunsen burner.

Common lab equipment : Used with a clamp and bosshead to hold equipment at specific heights. • : Holds objects at the required height on the retort stand. • : Holds the clamp onto the retort stand. •

Common lab equipment Stand • Retort stand: Used with a clamp and bosshead to hold equipment at specific heights. • Clamp: Holds objects at the required height on the retort stand. • Bosshead: Holds the clamp onto the retort stand. Bosshead Clamp Retort stand

Readings & measurements in science Tricks of the trade

Parallax error- meniscus • The curve on the upper surface of a liquid when in a container or object caused by surface tension. • Depending on the liquid, the curve can be either convex or concave. https: //www. youtube. com/watch? v=AWdy-Hyr. FD 8

Parallax error • When measuring the volume of a liquid in a measuring cylinder, we always read the measurement from where the middle, flat section of the meniscus is.

Measuring temperatures • Never rest the bulb of thermometer on the bottom of the container. • Ensure the liquid that you’re measuring the temperature of fully covers thermometers bulb. • Read thermometer at eye level. Thermometer bulb

Reading scales • When reading a measurement, you MUST determine what each of the markings on the measuring device mean. • Whenever you record a reading you MUST ALWAYS record the scale as well!