Prim 4 Concept 3.1 Part 1

........................... which put inside the toy are considered as source of energy.

• Batteries

• Motors

• Fans

• Bulbs

The missions of mars depend on ……………………… and ……………………………

• bicycles and robots.

• cars and buses.

• cars and planes.

• robots and vehicles.

The stored energy in buttery and food is …………………… energy.

• thermal

• chemical

• kinetic

• light

The main source of energy in the Earth surface is …………………

• the moon

• the Sun

• Mars

• Earth

The flow of energy till be with us is known as ……………………

• energy chain.

• energy.

• conservation law.

• waste energy.

Toy car which operated by a battery …………. energy converts into……….energy.

• thermal -> chemical

• chemical -> electrical -> kinetic

• light -> thermal

• potential -> kinetic

When you push on the bike pedals with your legs ……………………… energy converts into …………………… energy.

• chemical --> kinetic

• chemical -> electrical

• light -> thermal

• potential -> kinetic

When you rub your hand……………energy converts into ……………… energy.

• chemical --> kinetic

• chemical -> electrical

• kinetic -> thermal

• potential -> kinetic

Energy cannot be ……………………… nor ……………………

• can't be transform nor transferred.

• can't be changed nor transferred.

• can't created nor destroyed

• can't be converted nor transferred.

In a cell phone ………… energy changes to ................................ and ............................. of energy.

• chemical -> light and sound

• kinetic-> light and sound

• chemical -> kinetic and sound

• thermal -> light and sound