• Magnifying glasses and microscopes are fragile, so handle them with care. Don’t hit them or force any parts. • Hold glass coverslips and glass slides at the edges or use tweezers to avoid getting grease on them and contaminating them. • Never heat a completely sealed container. To heat a test tube, use a suitable holder to avoid it touching your skin. Always point the mouth of a container away from yourself and other people. • Never pour a liquid quickly into a test tube. Pour it slowly down the side of the tube. • Never use the same dropper for different reagents, as this can cause contamination or result in dangerous reactions. • Never transfer products to other bottles that are not labelled correctly. • Don’t play with the equipment or chemical products. • Always put stoppers you are using on the table facing upwards. Replace them as soon as you finish using the containers. • Keep your workspace clean and tidy. • Chemical products can be dangerous. Before using them, read the safety labels carefully to understand the possible risks and the precautions you need to take. • Handle corrosive products with care to avoid contact with your skin or clothes. Avoid touching, smelling or tasting any chemical or biological material. • Solid waste should be put in the appropriate bins. • Ask your teacher before pouring leftover liquids down the sink. Some waste products can be harmful to the environment and must be processed in a special way. Safety rules in the laboratory During laborator y experiments, you may handle chemical products or perform tasks that involve some risk. For this reason , it is necessar y to follow a set of rules to keep people and equipment safe. • Choose three rules. Explain the importance of following them and the consequences of not doing so. Highly toxic Harmful or irritant Flammable Oxidiser Corrosive Explosive Safety labels on chemical products The science project 12
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