1. Springs are used a lot in our daily lives.
2. Springs are used in tools and equipment , electrical appliances, stationery and toys.
For example :
playground horse
battery holder
shock absorber
stapler
Monday 24 December 2012
UNIT 5 ( LESSION 3 )
USES OF SPRINGS
1. Springs are used a lot in our daily lives.
2. Springs are used in tools and equipment , electrical appliances, stationery and toys.
For example :
playground horse
battery holder
shock absorber
stapler
1. Springs are used a lot in our daily lives.
2. Springs are used in tools and equipment , electrical appliances, stationery and toys.
For example :
playground horse
battery holder
shock absorber
stapler
Sunday 23 December 2012
UNIT 5 ( LESSION 2)
SPRINGS STRETCH DIFFERENTLY
1. Springs have different sizes and shapes.
2. Different springs streth differently.
3. A long spring stretches more than short spring.
4. A spring with a larger diameter stretches more than a spring with a smaller diameter.
5. Aspring made of thin wire stretches more than a spring made of thick wire.
Springs that stretch more = thin wire spring , big diameter spring , long spring
Springs that stretch less = thick wire spring , small diameter spring , short spring
1. Springs have different sizes and shapes.
2. Different springs streth differently.
3. A long spring stretches more than short spring.
4. A spring with a larger diameter stretches more than a spring with a smaller diameter.
5. Aspring made of thin wire stretches more than a spring made of thick wire.
Springs that stretch more = thin wire spring , big diameter spring , long spring
Springs that stretch less = thick wire spring , small diameter spring , short spring
Saturday 22 December 2012
UNIT 5 SPRINGS ( LESSION 1 )
SPRINGS RETURN TO ITS ORIGINAL SIZE AND SHAPE
1. A spring changes its size, shape and length when it is twisted, stretched or squeezed.
2. When a spring is released, it returns to its original size and shape.
1. A spring changes its size, shape and length when it is twisted, stretched or squeezed.
2. When a spring is released, it returns to its original size and shape.
*Introduction about twist, stretch , bend and squeeze.
http://ppdhl.net/courseware/ScienceY3/cd3/lesson/main/
Thursday 20 December 2012
UNIT 4 ( LESSION 2 )
MATERIALS THAT CONDUCT ELECTRICITY
1. Materials that allow electricity to flow throught them are called conductors.
2. Materials that do not allow electricity to flow through them are called non- conductors.
3. Non - conductors cannot complete a circuit.
4. Conductors can be used to complete a circuit.
CONDUCTORS
paper clip , metal ruler , pencil lead , tin can , coin , key .
NON-CONDUCTORS
wooden ruler , eraser , pen , cloth , candle , marble .
1. Materials that allow electricity to flow throught them are called conductors.
2. Materials that do not allow electricity to flow through them are called non- conductors.
3. Non - conductors cannot complete a circuit.
4. Conductors can be used to complete a circuit.
CONDUCTORS
paper clip , metal ruler , pencil lead , tin can , coin , key .
NON-CONDUCTORS
wooden ruler , eraser , pen , cloth , candle , marble .
Tuesday 18 December 2012
UNIT 4 ELECTRICITY(LESSION 1)
1. The objects below can be used to make a complete circuit.
~ battery , connecting wires , bulb holder , bulb .
2. A complete circuit makes the bulb light up.
3. The bulb lights up brighter when a battery is added to the circuit. This is because more electricity flows through the circuit.
4. The bulb lights up dimmer when a battery is removed from the circuit.
5. More batteries will make a bulb light up brighter. More bulb and longer wires will make a bulb light up dimmer.
~ battery , connecting wires , bulb holder , bulb .
2. A complete circuit makes the bulb light up.
3. The bulb lights up brighter when a battery is added to the circuit. This is because more electricity flows through the circuit.
4. The bulb lights up dimmer when a battery is removed from the circuit.
5. More batteries will make a bulb light up brighter. More bulb and longer wires will make a bulb light up dimmer.
Sunday 16 December 2012
REVISION NOTES FOR UNIT 3 (3.1)
TYPES OF MAGNETS
