GRADE 6 SCIENCE

1. ………. are from the artificial sources that are used before inventing the electric lamps.

• Candles

• Oil lamps

• Fluorescent lamps

• (a) and (b)

2. The electric lamp converts the electric energy into………………..energy.

• kinetic

• magnetic

• light

• sound

3. The filament of the light bulb is made of ……………………

• tungsten

• copper

• iron

• aluminium

4. ……………….allow the electric current to transfer from the lamp base to the filament

• The tungsten filament

• The argon gas

• Copper and lead wires in the light lamp

• The base of the light bulb

5. All the following are from the components of the fluorescent lamp except………………

• tungsten filaments

• points of connection

• two thick copper wires

• glass tube

6. The glass tube of the fluorescent lamp contains …………….

• neon gas

• argon gas and a little of mercury vapour.

• argon gas only

• hydrogen gas

7. We need a light bulb, battery and connecting wires connected together in a closed continuous path to…………………………

• obtain a continuous electric circuit

• make a simple electric circuit

• make the bulb lights up

• (a) , (b) and (c).

Tags

NGSS.4-PS3-2

8. When we connect more than one bulb in parallel to an electric source, the light intensity of the bulbs…………………………..

• decreases

• increases

• does not change

• (a) , (b) and (c)

9. If we have three light bulbs and we need to get high light intensity, so we must connect them……………………

• in series

• in parallel

• (a) and (b)

• without copper wires.

10. When an electric lamp which is connected in series with the other lamps burns out, .………

• light intensity decreases

• light intensity increases

• all lamps turn off

• no correct answer.