WorksheetsScience Review: Chapter 5
Total questions: 17
Worksheet time: 22mins
A battery is commonly known as a ....
cell
dynamo
wheel
electricity
Look at the part of a bulb! The part shown by the letter H is called ....
metal filament
metal wire
glass cover
metal tip
Look at the picture! There are two metal wires in a bulb. One of them is connected to the ..... The other one is connected to the ..... (Choose 2 options!)
metal casing
metal tip
glass cover
metal filament
Look at the picture! Which of the bulb will light up?
bulb A
bulb B
bulb C
bulb D
For the bulb to light up, the metal wires in the bulb must be connected to .....
both ends of a battery
one of the ends of a battery
an electric dynamo
an electric motor
The bulb lights up because an/a ... flows through it.
electric current
dynamo
motor
energy
The path through which the electric current through the battery, bulb, and wire is called ....
electric circuit
electric track
electric street
electric road
Look at the picture! This is called a ... circuit which is a continous path through which an electric current flows.
pushed
open
closed
pulled
Look at the picture! An/A ... circuit has a gap or break in it. No electric current can flow through it.
open
closed
pulled
pushed
A ... is an electrical component used to open or close an electric circuit.
switch
bulb
battery
wire
Observe the electric circuit shown in the picture! The following are the things that happen when the switch is closed, EXCEPT ....
There is no gap or break in the electric circuit.
The bulb lights up.
Electric current flows through the electric circuit.
There is a gap or break in the electric circuit.
Observe the flashlight picture! The bulb in the flashlight light up because ... and .... (choose 2 correct statements!)
the electric circuit is open
the electric circuit is closed
electric current flows through the electric circuit
no electric current flows through the electric circuit
Observe the pictures! When more batteries are connected one another in an electric circuit, a larger electric current flows through the whole circuit. Hence, the bulbs will be ....
dimmer
brighter
broken
damaged
Observe the pictures! When more bulbs are connected one another in an electric circuit, a lower electric current flows through the whole circuit. Hence, the bulbs will be ....
brighter
dimmer
damaged
broken
Look at the picture! The signs warn us against (a) ....
electric shocks
lightning
thunder
flash
A large current will make electrical wires and devices too hot. This can cause ... and burns.
fires
snow
rain
storms
Here are some safety precautions you should take when using electricity, EXCEPT ....
Do not touch electrical wires, devices or electrical sockets with wet hands
Do not poke your finger or anything other than electric plug into an electric socket
Use electrical devices which are damaged or have exposed wires
Do not plug too many electrical devices into an electrical socket
