It is the transfer of energy from one object to another due to a difference in temperature.

Part of the industry wherein electrical energy is produced from Earth's heat

It harnesses the sun's light energy to produce electricity

Process of adding impurities to the silicon plate

Amount of energy consumed even if the device is on standby mode

What is EER

We don't hear the sounds that machines produce because they are outside our hearing range. These sounds are beyond our _______________

A procedure that uses sound waves to produce images of an internal organ

What is a SONAR?

The reflected sounds of animals tell them how far is their prey or mate

It makes our work easy and fast

Lever, screw, inclined plane, wedge, pulley, wheel and axle

Produced when to or more of simple machines are combined to make a new and useful device.

Primary source of light energy on Earth

Commonly refers to electromagnetic radiation that can be detected by the human eye.

Ability of light allowing it to pass through; semitransparent.

The ability of light that can pass through objects is

An object that light cannot pass through is described as

The transfer of energy in the form of heat or electricity from one atom to another within an object by direct contact

This is a transfer of heat by mixing a fluid, such as a gas or liquid.

The transfer of energy in waves by electromagnetic radiation.

Acoustic oscillations whose frequency is below the low-frequency limit of audible sound

It is created when something vibrates and sends waves of energy into our ears.

This energy can be used to power electrical items such as toasters, kettles, cookers, televisions, and computer tablets.

These are subatomic particles that hold an elementary charge of magnitude -1

The back and forth motion of an object due to which sound is produced is known as

The loudness or the amount of maximum displacement of vibrating particles of the medium from their mean position when the sound is produced.

Pitch of sound

An electrical machine that converts electrical energy into mechanical energy.

Materials that allow electricity to flow through them easily

Any material that keeps energy such as electricity, heat, or cold from easily transferring through

Made up of a straight rigid object like a board or a bar that pivots on a turning point called a fulcrum.

It uses a wheel with a rod attached in the middle as an axle to help it to lift or move loads.

A type of simple machine that uses a wheel with a groove in it and a rope.

A flat surface with one end higher than the other. This allows for heavy objects to slide up to a higher point rather than be lifted. It is generally easier to slide something than to lift it.

Created when you put two inclined planes back to back. It is a simple machine used to push two objects apart.

It is a special kind of inclined plane. It's basically an inclined plane wrapped around a pole. It can be used to lift things or to hold them together.