العلوم الصف الرابع الابتدائى الترم الثانى

When you use the ha nd ball, the ....energy changed into sound energy.

The produced ...... energy doesn't help the blender do its job.

Coal is a type of fuel, which is used in all the following purposes except ...........

Electric wires are made of .............

All the following are found deeply under earth's surface except ......

When a piece of coal is burnt, .......... Energy is produced.

.......... is considered as the main resource of energy on Earth's surface.

Kinetic energy doesn't affect by the ..........

Curiosity rover is designed to explo r e .........

When you turn on a light bulb, the electrical energy travels through .......... until reaching the bulb.