Class 4 Science Test 11

The pleasant effect of sound is…………..?

Vibration produces…… ?

After rain when sunlight passes through water droplets, they divide it into seven colors  is called……….?

How many colors in sunlight?

Which energy runs a fan?

From where do plants get energy for growth?

Which energy does the sail boat use?

Prism is a………….-dimensional transparent object, which divides light into different colors?

Light is a form of………?

Generating electricity by means of heat produced by burning of fossil fuels like coal, gas is called………..?

The electricity generated by conversion of kinetic energy of water is called……....?

Generator is a device that converts mechanical energy into…………….?

Which of the following is/are the source/s of energy?

The biggest source of energy is:

The ability to do work is called_____?