Energy

Front

Which energy transformation occurs in an electric iron?

Back

electricity to heat

Front

Which of the following shows that chemical energy is changed to mechanical energy?

• lighting of candle
• switching on of a flashlight
• using sunlight to dry up clothes
• an athlete run after drinking fruit shake

Back

an athlete run after drinking fruit shake

Front

Which best describes the energy transformation in the picture?

Back

Electrical energy is being transformed into light energy and heat energy.

Front

chemical energy > electrical energy > _____________ > heat energy

Back

light energy, light

Front

Which does NOT tell the importance of electrical energy? Options: It lights homes, offices, and schools. It runs appliances and other gadgets. It makes work faster and easier. It gives the body energy to work.

Back

It gives the body energy to work

Front

The mechanical energy of the windmill is transformed into _________, which gives light to homes, schools, offices, and establishments.

Back

Electrical energy

Front

Which of the following converts electrical energy to light, heat, and sound?

Back

Front

Which of the following statements is NOT true?

• The total amount of energy in a system remains constant.
• Energy cannot be created nor destroyed.
• Energy can be created but not destroyed.
• Energy can be transformed.

Back

Energy can be created but not destroyed.

Front

Energies involved when lighting a match: mechanical, chemical, radiant, nuclear.

Back

nuclear

Front

Which of the following does NOT contribute to energy conservation?

• Turn off the lights and electric fans as you leave your classroom.
• Let the water flow as you brush your teeth.
• Close all windows as you switch on the air-conditioning unit.
• Ride to school with your brothers and sisters in one car.

Back

Let the water flow as you brush your teeth.