Science 5 Marks Questions

Table : Identifying Conductors and Insulators

Object	Material: It is made up of	Lamp glows (Yes/No)	Conclusion (Conductor/ Insulator)
Stick	Wood	No	Insulator
Scale	Plastic	No	Insulator
Bangle	Glass	No	Insulator
Paper strip	Paper	No	Insulator
Candle	Wax	No	Insulator
Key	Metal	Yes	Conductor
Eraser	Rubber	No	Insulator
Paperclip	Metal	Yes	Conductor
Copper wire	Copper	Yes	Conductor
Aluminum foil	Aluminum	Yes	Conductor
Rubber band	Rubber	No	Insulator
Glass jar	Glass	No	Insulator

Observation and conclusion: This activity shows the difference between conductors and insulators. Conductors allow electricity to flow through them, making the lamp glow. Insulators, on the other hand, do not allow the current to pass through them, so the lamp stays off.

 Materials Needed:
Two drawing pins,A safety pin (or paper clip),Two pieces of insulated wire},A small piece of cardboard
→ Take the small piece of cardboard. This will serve as the base for your switch.
→ Make sure the cardboard is dry and clean.
→ Push one of the drawing pins through the loop or head of the safety pin.
→ Insert this drawing pin into the cardboard.
→ Ensure the safety pin can rotate freely around the drawing pin. This will be the movable part of your switch.
→ Place the second drawing pin a short distance away from the first one on the cardboard.
→ Position it so that the free end of the safety pin can touch this drawing pin when rotated.
→ Push the second drawing pin firmly into the cardboard.
→ Take the two pieces of insulated wire.Wrap one end of the first wire around the first drawing pin (the one with the safety pin).
→ Wrap one end of the second wire around the second drawing pin.
→ Make sure the wire makes good contact with the metal of the drawing pins.
→ Now, switch is ready to be tested.
→ Connect the free ends of the wires into a circuit with a battery and a light bulb.
→ When the safety pin is touching the second drawing pin, the circuit is complete, and the bulb should light up.
→ When the safety pin is not touching the second drawing pin, the circuit is open, and the bulb should not light up.

→ Electricity can be dangerous, and it's crucial to handle it with care to prevent injury or accidents.
 → Firstly, never touch electrical switches or plugs with wet hands, as water increases the risk of electric shock.
 → Secondly, avoid using electrical devices in wet areas or near water sources.
→ Thirdly, always ensure that electrical equipment is properly insulated, and never handle equipment with damaged insulation or broken plugs.
→ Remember, our body is a conductor of electricity, so it's essential to take precautions to prevent electric current from passing through it.

self

→ A torchlight works by using a simple electrical circuit to produce light.
→ It starts with a battery (or multiple batteries) as its power source. When you turn the switch on, it closes the circuit, allowing electric current to flow from the battery.
→ This current travels through a thin wire called a filament (in older torchlights) or a Light Emitting Diode (LED) in newer ones. As the current passes through the filament, it heats up and glows brightly, producing light. In an LED, the current causes the diode to emit light directly.
→ The light is then focused by a reflector, which is a shiny, curved surface behind the bulb or LED, directing the light forward to illuminate the path in front of you.
→ When you switch the torch off, it breaks the circuit, stopping the flow of current and turning off the light.
→ So, in summary, a torchlight uses electrical energy from a battery to create light through a closed circuit involving a bulb or LED and a reflector to direct the light.