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SAFETY SYMBOLS IN THE LAB

SAFETY SYMBOLS IN THE LAB. Flammable. Explosive. Toxic. Corrosive. Radioactive. Harmful to the environment. Harmful/ Irritant. Barrel. Collar. Air hole. Base. Rubber tube. THE HAND BONES. Phalanges (finger Bones). Metacarpels (hand bones). Carpels (wrist bones).

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SAFETY SYMBOLS IN THE LAB

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  1. SAFETY SYMBOLS IN THE LAB Flammable Explosive Toxic Corrosive Radioactive Harmful to the environment Harmful/ Irritant Year 4 Revision booklet

  2. Year 4 Revision booklet

  3. Barrel Collar Air hole Base Rubber tube Year 5 Revision booklet

  4. Year 4 Revision booklet

  5. THE HAND BONES Phalanges (finger Bones) Metacarpels (hand bones) Carpels (wrist bones) Year 4 Revision booklet

  6. The Functions of the Skeleton The three functions of the skeleton are: • Support- Bones give us shape • Protection - for vital organs to be stored safely inside • Movement

  7. MUSCLES Muscles work in pairs to move the parts of the body. They are called antagonistic muscles. In the arm, the bicep and triceps work together to bend and straighten the arm Muscles are attached to the bones by tendons Year 4 Revision booklet

  8. Particles of Solids & Liquids • Properties of Solids • Particles closely • packed • Can be cut • Hard to compress • Has a fixed shape solid liquid SOLIDS & LIQUIDS The particles are tightly packed together. They don’t move very easily. The particles can move around slightly so LIQUIDS can flow. • Properties of Liquids • Particles further apart • Takes shape of container • Can be slightly compressed • Can flow • Separating solids & Liquids • Filtering – to separate an insoluble solid from liquid • Explain what happens when solids mix with liquids: • Some solids dissolve in the liquids eg salt, sugar • Insoluble solids sink to the bottom

  9. ELECTRICITY Circuit symbols Circuit diagrams It is often difficult to draw electrical circuits, so we use circuit symbols instead. Wires are shown as straight lines between the different circuit symbols. A circuit diagram is to use circuit symbols instead of drawing each component in the circuit. Open switch (off) M Motor The difference between the symbol for a cell and the symbol for a battery: what we usually call a single battery, such as one you might buy for your torch is actually called a cell - it is only when you have two or more of these cells connected together that you get a battery. Always try to make the wires straight lines, and don't be tempted to make them wiggly. The whole point is to make it easier to see what is connected to what

  10. ELECTRICITY- PART 3 3. Switches • When a switch is open (off), there is a gap in the circuit. Electricity cannot travel around the circuit. • When a switch is closed (on), it makes the circuit complete. Electricity can travel around the circuit.

  11. KEEPING WARM Thermal Insulators keep things warm and cold. WATER BOILS BODY TEMPERATURE AVERAGE ROOM TEMPERATURE WATER FREEZES Polystyrene is a good insulator, to keep food warm. Plastic and bubble wrap are good insulators too! Thermal conductors allow heat to flow through them Saucepans are made of metal because it allows the heat to flow through it.

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