Energy

Which energy transformation occurs in an electric iron?

• heat to light

• light to heat

• heat to electricity

• electricity to heat

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

Which best describes the energy transformation in the picture?

• Light energy is being transformed to heat energy.

• Mechanical energy is being transformed into electrical energy.

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

• Electrical energy is being transformed into heat energy and mechanical energy.

chemical energy > electrical energy > (a)   > heat energy

Which does NOT tell the importance of electrical energy?

• 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

Tags

NGSS.MS-ETS1-1

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

• Chemical energy

• Nuclear energy

• Electrical energy

• Radiant energy

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

• 
• 
• 
• 

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.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

Which of the following energies is NOT involved when lighting a match?

• mechanical

• chemical

• radiant

• nuclear

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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.

Tags

NGSS.MS-PS3-3