safety symbols in the lab
DESCRIPTION
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). - PowerPoint PPT PresentationTRANSCRIPT
Year 4 Revision booklet 1
SAFETY SYMBOLS IN THE LAB
Flammable Explosive Toxic Corrosive
Harmful to the environment
Radioactive Harmful/ Irritant
Year 4 Revision booklet 2
Year 5 Revision booklet 3
Barrel
Air hole
Base
Collar
Rubbertube
Year 4 Revision booklet 4
Year 4 Revision booklet 5
Metacarpels(hand bones)
Carpels(wrist bones)
Phalanges(finger Bones)
THE HAND BONES
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
Year 4 Revision booklet 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 armMuscles are attached to the bones by tendons
SOLIDS & LIQUIDS
Particles of Solids & Liquids Properties of Solids
• Particles closely packed•Can be cut•Hard to compress•Has a fixed shape
Properties of Liquids•Particles further apart•Takes shape of container•Can be slightly compressed•Can flowExplain what happens when
solids mix with liquids:•Some solids dissolve in the liquids eg salt, sugar•Insoluble solids sink to the bottom
Separating solids & Liquids• Filtering – to separate an insoluble solid from liquid
The particles are tightly packed together. They don’t move very easily.
The particles can move around slightly so LIQUIDS can flow.
solid liquid
ELECTRICITYCircuit symbols
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.
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.
M
Motor
Open switch (off)
Circuit diagrams
A circuit diagram is to use circuit symbols instead of drawing each component in the circuit.
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
ELECTRICITY- PART 33. 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.
KEEPING WARMWATER BOILS
BODY TEMPERATUREAVERAGE ROOM TEMPERATURE
Thermal Insulators keep things warm and cold.
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.
WATER FREEZES