When you hear the sound from a car, the car is a (a)   of sound.

You hear your friend whispering to you. This shows sound travels through (a)   .

When you hear rain on the roof, it shows that sound travels through (a)   .

The sound is (a)   when it is travelling through solids.

We can hear sounds when the (a)   reach our ears.

(a)   the sound vibrations in the tube makes the sound louder.

Sounds that is coming from a clock will be (a)   when you moved the clock further away from your ear.

The (a)   of a sound is how loud or soft it is.

We can use (a)   to measure the volume of a sound.

The unit of the volume of a sound is (a)   .

We can (a)   sounds by using ear defenders if they are too loud.

The sound inside an aeroplane can be loud so the pilots use (a)   to protect their ears.

Slow vibrations produce a (a)   sound.

By tightening the string from a guitar, we can get (a)   sound.

Banging a small drum makes (a)   vibrations then we can hear a high-pitched note.

A musical instrument that you can play by blowing is called (a)   instrument.

The (a)   the column of air is, the lower the pitch of the sound.

The volume of sound from an electric hand drill could (a)   ears.

The (a)   of a sound means how high or low a sound is.

Cells push (a)   around a circuit.

A continuous flow of electricity is called (a)   .

We need a (a)   to stand the bulb in upright position.

An example of power source is a (a)   .

If a circuit is incomplete or broken, it is a(n) (a)   circuit.

In a pitcture, the current is flowing (a)   direction if you close the switch.

The bulb in a complete circuit is called a (a)   of this circuit.

The bulbs shine (a)   when you add more bulbs to the circuit.

The strength of electricity is called (a)   .

Mains electricity has a much (a)   voltage than the electricity from cells.

You must follow (a)   when using electricity.

(a)   is the unit of strength of electricity.

If mains electricity flows through your body, you will get a(n) (a)   .

(a)   can open or close the circuit.

Two magnets' north poles facing each other will (a)   .

If an object is magnetic, it is said to be (a)   to a magnet.

The two magnetic poles on bar magnets are (a)   .

The area that surrounds a magnet and can exert a force on an object that magnetic is called a (a)   .

When the north pole of one magnet and the south pole of another magnet meet, they will (a)   .

Magnetism is a type of (a)   .

Magnets have (a)   strengths.

Aluminium is a (a)   material.

We need to store magnets by using (a)   in a box.

Attraction and (a)   are magnetic forces.

(a)   is an alloy of copper and zinc.

We can get an alloy called stainless steel by mixing (a)   and steel.

Steel is (a)   than iron and that is use to make machines.

Objects that attracted to a magnet are called (a)   objects.

Cans for cold drinks are made of (a)   metals.

Iron and zinc can (a)   if they exposed with water and air.