Science Grade 4

A type of high-pitched sound energy which is used in hospitals to show images of the parts inside our body is called ____________________________.

• ultrasound

• LASER

• siren

Laser is actually an acronym for ...

• Laser Amplification by Stimulated Emission of Radiation

• Light Amplification by Stimulated Emission of Rotation

• Light Amplification by Stimulated Emission of Radiation

Larry is learning how to surf at Pangandaran Beach.

What form of energy does he apply?

• sound energy

• kinetic energy

• electrical energy

People can cross safely when drivers and motorists stop their vehicles at the traffic light.

What form of energy does occur?

• sound energy

• kinetic energy

• light energy

Many people enjoy playing musical instruments and listening to songs.

They are using sound energy for ....

• surgery

• fuel

• entertainment

Potential energy is also known as ____________________

• stored energy

• inside energy

• kinetic energy

The electricity that flows in an electric circuit is called ____________.

• electric circuit

• electric current

• electric conductor

A battery has ... terminals.

• two

• three

• four

Materials that allow an electric current to flow through them are called electrical ___________________.

• condensation

• conductors

• contractor

Materials that do not allow an electric current to flow through them are called electrical ___________________.

• insulators

• conductors

• current